Number
720,013
- Positive
- Odd
- Composite
- 6 digits
720,013 is an odd 6-digit integer and a composite number. It has 4 divisors and a digital root of 4.
Number properties
ParityOddnot divisible by 2
SignPositive
PrimalityComposite
Absolute value720,013
Digit count6
Digit sum13
Digital root4repeated digit sum
PalindromicNoreads differently backwards
Happy numberNosquared-digit sums reach 1
Harshad numberNodivisible by its own digit sum
Factors & divisors
Prime factorisation7 × 102,859
Distinct prime factors27, 102,859
Number of divisors4
Sum of divisors σ(n)822,880
Aliquot sum102,867sum of the proper divisors
ClassificationDeficientthe aliquot sum is less than the number
Euler's totient φ(n)617,148integers below n that share no factor with it
SquarefreeYesno repeated prime factor
All divisors1, 7, 102,859, 720,0134 in total
Arithmetic
Representations
Decimal720,013
Binary1010111111001000110120 bits
Octal2576215
HexadecimalAFC8D
Base 36FFKD
Roman numeralNot defined above 3,999there is no agreed standard notation
In wordsseven hundred and twenty thousand and thirteen
Ordinalseven hundred and twenty thousand and thirteenth
Scientific notation7.20013 × 10^5
Engineering notation720.013 × 10^3
Nearest landmarks
Powers & multiples
720,013 to the power 2518,418,720,169
720,013 to the power 3373,268,217,965,042,197
720,013 to the power 4268,757,969,421,663,927,388,561
720,013 to the power 5193,509,231,837,200,509,350,819,971,293
First ten multiples720,013, 1,440,026, 2,160,039, 2,880,052, 3,600,065, 4,320,078, 5,040,091, 5,760,104, 6,480,117, 7,200,130
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 3
Divisible by 6No, remainder 1
Divisible by 7Yes
Divisible by 8No, remainder 5
Divisible by 9No, remainder 4
Divisible by 10No, remainder 3
Divisible by 11No, remainder 8
Divisible by 12No, remainder 1
Divisible by 100No, remainder 13
Collatz (3n + 1) trajectory
Steps to reach 166the total stopping time
Highest value reached2,160,0403× the starting value
Reaches 1Yesthe Collatz conjecture says every positive integer does, but it is unproven
First steps720,013 → 2,160,040 → 1,080,020 → 540,010 → 270,005 → 810,016 → 405,008 → 202,504 → 101,252 → 50,626 → …
Last steps… → 32 → 16 → 8 → 4 → 2 → 1
As a percentage & fraction
As a percentage72,001,300%
720,013% as a decimal7,200.13
720,013% of 100720,013
720,013% of 1,0007,200,130
As a fraction of 100720,013/100
Read another way
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Derived from 720,013
Also reads as
#720013 (colour)
- #720013
- Red
- Dark
- Nearest: Maroon
#720013 is a red with RGB values 114, 0, 19 and HSL 350°, 100%, 22%. It is a dark colour, so white text on it reaches 12.2:1 contrast (AAA for normal text). The nearest named colour is Maroon.
Colour values
#720013#720013
HEX#720013
RGBrgb(114, 0, 19)
RGB (0–1)0.4471, 0, 0.0745
RGB percentages44.7%, 0%, 7.5%
HSLhsl(350, 100%, 22.4%)
HSV / HSBhsv(350, 100%, 44.7%)
CMYK0%, 100%, 83.3%, 55.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer7,471,123
CSS custom property--colour: #720013;
Brightness & contrast
Relative luminance0.03624WCAG 2.x, 0 is black and 1 is white
Perceived brightness62.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 12.17:1
Contrast with white12.17:1WCAG normal text: AAA
Contrast with black1.72:1WCAG normal text: Fail
Greyscale equivalent#1A1A1A
Inverted#8DFFEC
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text12.17:1WCAG large text: AAA
Contrast with black, large text1.72:1WCAG large text: Fail
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#00725F
Analogous#72004C, #722600
Triadic#137200, #001372
Split complementary#007226, #004C72
Tetradic#4C7200, #00725F, #260072
Tints, shades & saturation
Channel breakdown
R114
G0
B19
Red114 (44.7%)
Green0 (0%)
Blue19 (7.5%)
Hue350°
Saturation (HSL)100%
Lightness22.35%
Dominant channelRed
Hex per channelR 72 · G 00 · B 13
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