Recognised as Number
842,749
- Positive
- Odd
- Composite
- 6 digits
842,749 is an odd 6-digit integer and a composite number. It has 4 divisors and a digital root of 7.
Number properties
ParityOddnot divisible by 2
SignPositive
PrimalityComposite
Absolute value842,749
Digit count6
Digit sum34
Digit product16,128
Multiplicative persistence5times the digit product can be taken before one digit is left
Digital root7repeated digit sum
PalindromicNoreads differently backwards
Happy numberYessquared-digit sums reach 1
Harshad numberNodivisible by its own digit sum
Factors & divisors
Prime factorisation37 × 22,777
Distinct prime factors237, 22,777
Number of divisors4
Sum of divisors σ(n)865,564
Aliquot sum22,815sum of the proper divisors
ClassificationDeficientthe aliquot sum is less than the number
Euler's totient φ(n)819,936integers below n that share no factor with it
Carmichael function λ(n)68,328the smallest exponent with aˣ ≡ 1 for every unit; smaller than φ(n) = 819,936
Möbius function μ(n)+12 distinct prime factors, an even number of them
SquarefreeYesno repeated prime factor
All divisors1, 37, 22,777, 842,7494 in total
Arithmetic
Representations
Decimal842,749
Binary1100110110111111110120 bits
Octal3155775
HexadecimalCDBFD
Base 36I29P
Roman numeralNot defined above 3,999there is no agreed standard notation
In wordseight hundred and forty-two thousand, seven hundred and forty-nine
Ordinaleight hundred and forty-two thousand, seven hundred and forty-ninth
Scientific notation8.42749 × 10^5
Engineering notation842.749 × 10^3
In other bases
Ternary1120211000221base 3; the most digit-efficient integer base after e: 13 digits
Quinary203431444base 5; one hand: 9 digits
Septenary10106665base 7: 8 digits
Nonary1524027base 9; each digit is two ternary digits: 7 digits
Duodecimal347851base 12; divides by 2, 3, 4 and 6, which is why eggs and inches come in twelves: 6 digits
Vigesimal556h9base 20; hands and feet, and the Mayan and Yoruba systems: 5 digits
Sexagesimal3:54:5:49base 60; Babylonian, and still how an hour and a circle are divided: 4 digits
Balanced ternary1TTT1T110010T1digits −1, 0 and +1 written T, 0 and 1; negation is swapping T and 1, so no sign is needed
Negabinary111010010110000001101base −2; place values alternate 1, −2, 4, −8, so every integer has exactly one form without a sign
Bit-level
00000000000011001101101111111101
Bit length20 bitsto write the magnitude
Set bits15the population count, or Hamming weight
Zero bits5within that length
Bit parityodd15 set bits, so odd; not the same as the number itself being odd
Highest set bitbit 19worth 524,288
Lowest set bitbit 00 trailing zeros
Power of twoNo
Bytes30c db fd
Gray code10101011011000000011n XOR (n >> 1); successive values differ in exactly one bit
At each machine width
32-bit00000000000011001101101111111101
64-bit0000000000000000000000000000000000000000000011001101101111111101
One's complement11111111111100110010010000000010at 32 bits, every bit flipped
Bits reversed10111111110110110011000000000000at 32 bits
Rotated left by 100000000000110011011011111111010at 32 bits, wrapping
Shifted left by 1110011011011111111010= 1,685,498, no wrap
Shifted right by 11100110110111111110= 421,374, discarding the low bit
These bits as a double4.16373329 × 10^-318≈IEEE-754 binary64 reinterpretation of the same 64 bits (subnormal)
Nearest landmarks
Powers & multiples
842,749 to the power 2710,225,877,001
842,749 to the power 3598,542,147,616,715,749
842,749 to the power 4504,420,796,361,839,580,754,001
842,749 to the power 5425,100,121,713,143,944,840,853,588,749
First ten multiples842,749, 1,685,498, 2,528,247, 3,370,996, 4,213,745, 5,056,494, 5,899,243, 6,741,992, 7,584,741, 8,427,490
Powers of twoBetween 2^19 (524,288) and 2^20 (1,048,576)
Divisibility tests
Divisible by 2No, remainder 1
Divisible by 3No, remainder 1
Divisible by 4No, remainder 1
Divisible by 5No, remainder 4
Divisible by 6No, remainder 1
Divisible by 7No, remainder 5
Divisible by 8No, remainder 5
Divisible by 9No, remainder 7
Divisible by 10No, remainder 9
Divisible by 11No, remainder 6
Divisible by 12No, remainder 1
Divisible by 100No, remainder 49
Collatz (3n + 1) trajectory
Steps to reach 1206the total stopping time
Highest value reached12,149,33214× the starting value
Reaches 1Yesthe Collatz conjecture says every positive integer does, but it is unproven
First steps842,749 → 2,528,248 → 1,264,124 → 632,062 → 316,031 → 948,094 → 474,047 → 1,422,142 → 711,071 → 2,133,214 → …
Last steps… → 5 → 16 → 8 → 4 → 2 → 1
As a percentage & fraction
As a percentage84,274,900%
842,749% as a decimal8,427.49
842,749% of 100842,749
842,749% of 1,0008,427,490
As a fraction of 100842,749/100
Read another way
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Derived from 842,749
Also reads as
#842749 (colour)
- #842749
- Red
- Dark
- Nearest: Pale violetred
#842749 is a red with RGB values 132, 39, 73 and HSL 338°, 54%, 34%. It is a dark colour, so white text on it reaches 8.9:1 contrast (AAA for normal text). The nearest named colour is Pale violetred.
Colour values
#842749#842749
HEX#842749
RGBrgb(132, 39, 73)
RGB (0–1)0.5176, 0.1529, 0.2863
RGB percentages51.8%, 15.3%, 28.6%
HSLhsl(338.1, 54.4%, 33.5%)
HSV / HSBhsv(338.1, 70.5%, 51.8%)
CMYK0%, 70.5%, 44.7%, 48.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer8,660,809
CSS custom property--colour: #842749;
Brightness & contrast
Relative luminance0.06838WCAG 2.x, 0 is black and 1 is white
Perceived brightness81.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 8.87:1
Contrast with white8.87:1WCAG normal text: AAA
Contrast with black2.37:1WCAG normal text: Fail
Greyscale equivalent#3D3D3D
Inverted#7BD8B6
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text8.87:1WCAG large text: AAA
Contrast with black, large text2.37:1WCAG large text: Fail
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#278462
Analogous#842778, #843427
Triadic#498427, #274984
Split complementary#278433, #277884
Tetradic#788427, #278462, #332784
Tints, shades & saturation
Channel breakdown
R132
G39
B73
Red132 (51.8%)
Green39 (15.3%)
Blue73 (28.6%)
Hue338.06°
Saturation (HSL)54.39%
Lightness33.53%
Dominant channelRed
Hex per channelR 84 · G 27 · B 49
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Harmonies
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