Recognised as Number
2,425
- Positive
- Odd
- Composite
- 4 digits
2,425 is an odd 4-digit integer and a composite number. It has 6 divisors and a digital root of 4.
Number properties
ParityOddnot divisible by 2
SignPositive
PrimalityComposite
Absolute value2,425
Digit count4
Digit sum13
Digit product80
Multiplicative persistence2times the digit product can be taken before one digit is left
Digital root4repeated digit sum
PalindromicNoreads differently backwards
Happy numberYessquared-digit sums reach 1
Harshad numberNodivisible by its own digit sum
Factors & divisors
Prime factorisation5^2 × 97
Distinct prime factors25, 97
Number of divisors6
Sum of divisors σ(n)3,038
Aliquot sum613sum of the proper divisors
ClassificationDeficientthe aliquot sum is less than the number
Euler's totient φ(n)1,920integers below n that share no factor with it
Carmichael function λ(n)480the smallest exponent with aˣ ≡ 1 for every unit; smaller than φ(n) = 1,920
Möbius function μ(n)0zero, because a prime divides n twice
SquarefreeNohas a repeated prime factor
All divisors1, 5, 25, 97, 485, 2,4256 in total
Arithmetic
Representations
Decimal2,425
Binary10010111100112 bits
Octal4571
Hexadecimal979
Base 361VD
Roman numeralMMCDXXV
In wordstwo thousand, four hundred and twenty-five
Ordinaltwo thousand, four hundred and twenty-fifth
Scientific notation2.425 × 10^3
Engineering notation2.425 × 10^3
In other bases
Ternary10022211base 3; the most digit-efficient integer base after e: 8 digits
Quinary34200base 5; one hand: 5 digits
Septenary10033base 7: 5 digits
Nonary3284base 9; each digit is two ternary digits: 4 digits
Duodecimal14a1base 12; divides by 2, 3, 4 and 6, which is why eggs and inches come in twelves: 4 digits
Vigesimal615base 20; hands and feet, and the Mayan and Yoruba systems: 3 digits
Sexagesimal40:25base 60; Babylonian, and still how an hour and a circle are divided: 2 digits
Balanced ternary10100T11digits −1, 0 and +1 written T, 0 and 1; negation is swapping T and 1, so no sign is needed
Negabinary1111010001001base −2; place values alternate 1, −2, 4, −8, so every integer has exactly one form without a sign
Bit-level
0000100101111001
Bit length12 bitsto write the magnitude
Set bits7the population count, or Hamming weight
Zero bits5within that length
Bit parityodd7 set bits, so odd; not the same as the number itself being odd
Highest set bitbit 11worth 2,048
Lowest set bitbit 00 trailing zeros
Power of twoNo
Bytes209 79
Gray code110111000101n XOR (n >> 1); successive values differ in exactly one bit
At each machine width
16-bit0000100101111001
32-bit00000000000000000000100101111001
64-bit0000000000000000000000000000000000000000000000000000100101111001
One's complement1111011010000110at 16 bits, every bit flipped
Bits reversed1001111010010000at 16 bits
Rotated left by 10001001011110010at 16 bits, wrapping
Shifted left by 11001011110010= 4,850, no wrap
Shifted right by 110010111100= 1,212, discarding the low bit
These bits as a double1.19810919 × 10^-320≈IEEE-754 binary64 reinterpretation of the same 64 bits (subnormal)
Nearest landmarks
Powers & multiples
2,425 to the power 25,880,625
2,425 to the power 314,260,515,625
2,425 to the power 434,581,750,390,625
2,425 to the power 583,860,744,697,265,625
First ten multiples2,425, 4,850, 7,275, 9,700, 12,125, 14,550, 16,975, 19,400, 21,825, 24,250
Powers of twoBetween 2^11 (2,048) and 2^12 (4,096)
Divisibility tests
Divisible by 2No, remainder 1
Divisible by 3No, remainder 1
Divisible by 4No, remainder 1
Divisible by 5Yes
Divisible by 6No, remainder 1
Divisible by 7No, remainder 3
Divisible by 8No, remainder 1
Divisible by 9No, remainder 4
Divisible by 10No, remainder 5
Divisible by 11No, remainder 5
Divisible by 12No, remainder 1
Divisible by 100No, remainder 25
Collatz (3n + 1) trajectory
Steps to reach 1164the total stopping time
Highest value reached1,276,936526× the starting value
Reaches 1Yesthe Collatz conjecture says every positive integer does, but it is unproven
First steps2,425 → 7,276 → 3,638 → 1,819 → 5,458 → 2,729 → 8,188 → 4,094 → 2,047 → 6,142 → …
Last steps… → 5 → 16 → 8 → 4 → 2 → 1
As a percentage & fraction
As a percentage242,500%
2,425% as a decimal24.25
2,425% of 1002,425
2,425% of 1,00024,250
As a fraction of 1002,425/100
Read another way
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Derived from 2,425
Also reads as
2425 (year)
- Common year
- 365 days
- 25th century
- Rooster
2425 will be a common year of 365 days. It begins on a Wednesday and ends on a Wednesday. Easter Sunday falls on 6 April.
Structure of the year
Patterns forced by the calendar
Weekday counts52 of each, plus an extra Wednesday365 days is 52 weeks and 1 day, and the remainder starts on the weekday 1 January falls on
Sundays52
Mondays52
Tuesdays52
Wednesdays53one of the extras
Thursdays52
Fridays52
Saturdays52
Friday the 13th1 of them13 June
ISO weeks52an ordinary 52-week year
Same calendar as2414the most recent year whose calendar is identical, so a printed one could be reused
Calendar repeats in2431, 2442, 24536 years later, then again after that; the gap is 6, 11 or 28 years, broken by centuries that skip a leap year
Months of 2425
January31 days, starts Wednesday
February28 days, starts Saturday
August31 days, starts Friday
September30 days, starts Monday
October31 days, starts Wednesday
November30 days, starts Saturday
December31 days, starts Monday
Time references
These values depend on today’s date and change daily.
Unix timestamp at the start14,358,470,400
Unix timestamp at the end14,390,006,399
Years from now399 years from now
Days from today145,469 days to 1 January
The number 2425
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Also reads as
#224422 (colour)
- #224422
- Green
- Dark
- Nearest: Dark olivegreen
#224422 is a green with RGB values 34, 68, 34 and HSL 120°, 33%, 20%. It is a dark colour, so white text on it reaches 10.9:1 contrast (AAA for normal text). The nearest named colour is Dark olivegreen.
Colour values
#224422#224422
HEX#224422
HEX (short)#242
RGBrgb(34, 68, 34)
RGB (0–1)0.1333, 0.2667, 0.1333
RGB percentages13.3%, 26.7%, 13.3%
HSLhsl(120, 33.3%, 20%)
HSV / HSBhsv(120, 50%, 26.7%)
CMYK50%, 0%, 50%, 73.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,245,666
CSS custom property--colour: #224422;
Brightness & contrast
Relative luminance0.0459WCAG 2.x, 0 is black and 1 is white
Perceived brightness56.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 10.95:1
Contrast with white10.95:1WCAG normal text: AAA
Contrast with black1.92:1WCAG normal text: Fail
Greyscale equivalent#3A3A3A
Inverted#DDBBDD
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text10.95:1WCAG large text: AAA
Contrast with black, large text1.92:1WCAG large text: Fail
Named colours
Hue familygreen
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#442244
Analogous#334422, #224433
Triadic#222244, #442222
Split complementary#332244, #442233
Tetradic#223344, #442244, #443322
Tints, shades & saturation
Channel breakdown
R34
G68
B34
Red34 (13.3%)
Green68 (26.7%)
Blue34 (13.3%)
Hue120°
Saturation (HSL)33.33%
Lightness20%
Dominant channelGreen
Hex per channelR 22 · G 44 · B 22
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Harmonies
Similar named colours
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