Number
102
- Positive
- Even
- Composite
- 3 digits
102 is an even 3-digit integer and a composite number. It has 8 divisors and a digital root of 3.
The canonical address for this page is /102.
Number properties
ParityEvendivisible by 2
SignPositive
PrimalityComposite
Absolute value102
Digit count3
Digit sum3
Digital root3repeated digit sum
PalindromicNoreads differently backwards
Happy numberNosquared-digit sums reach 1
Harshad numberYesdivisible by its own digit sum
Factors & divisors
Prime factorisation2 × 3 × 17
Distinct prime factors32, 3, 17
Number of divisors8
Sum of divisors σ(n)216
Aliquot sum114sum of the proper divisors
ClassificationAbundantthe aliquot sum exceeds the number
Euler's totient φ(n)32integers below n that share no factor with it
SquarefreeYesno repeated prime factor
All divisors1, 2, 3, 6, 17, 34, 51, 1028 in total
Arithmetic
Representations
Decimal102
Binary11001107 bits
Octal146
Hexadecimal66
Base 362U
Roman numeralCII
In wordsone hundred and two
Ordinalone hundred and second
Scientific notation1.02 × 10^2
Engineering notation102
Nearest landmarks
Powers & multiples
102 to the power 210,404
102 to the power 31,061,208
102 to the power 4108,243,216
102 to the power 511,040,808,032
First ten multiples102, 204, 306, 408, 510, 612, 714, 816, 918, 1,020
Powers of twoBetween 2^6 (64) and 2^7 (128)
Divisibility tests
Divisible by 2Yes
Divisible by 3Yes
Divisible by 4No, remainder 2
Divisible by 5No, remainder 2
Divisible by 6Yes
Divisible by 7No, remainder 4
Divisible by 8No, remainder 6
Divisible by 9No, remainder 3
Divisible by 10No, remainder 2
Divisible by 11No, remainder 3
Divisible by 12No, remainder 6
Divisible by 100No, remainder 2
Collatz (3n + 1) trajectory
Steps to reach 125the total stopping time
Reaches 1Yesthe Collatz conjecture says every positive integer does, but it is unproven
First steps102 → 51 → 154 → 77 → 232 → 116 → 58 → 29 → 88 → 44 → …
Last steps… → 5 → 16 → 8 → 4 → 2 → 1
As a percentage & fraction
As a percentage10,200%
102% as a decimal1.02
102% of 100102
102% of 1,0001,020
As a fraction of 100102/100
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Derived from 102
Other readings
Also reads as
#000102 (colour)
- #000102
- Blue
- Dark
- Nearest: Black
#000102 is a blue with RGB values 0, 1, 2 and HSL 210°, 100%, 0%. It is a dark colour, so white text on it reaches 20.9:1 contrast (AAA for normal text). The nearest named colour is Black.
Colour values
#000102#000102
HEX#000102
RGBrgb(0, 1, 2)
RGB (0–1)0, 0.0039, 0.0078
RGB percentages0%, 0.4%, 0.8%
HSLhsl(210, 100%, 0.4%)
HSV / HSBhsv(210, 100%, 0.8%)
CMYK100%, 50%, 0%, 99.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer258
CSS custom property--colour: #000102;
Brightness & contrast
Relative luminance0.00026WCAG 2.x, 0 is black and 1 is white
Perceived brightness1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 20.89:1
Contrast with white20.89:1WCAG normal text: AAA
Contrast with black1.01:1WCAG normal text: Fail
Greyscale equivalent#010101
Inverted#FFFEFD
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text20.89:1WCAG large text: AAA
Contrast with black, large text1.01:1WCAG large text: Fail
Named colours
Hue familyblue
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#020100
Analogous#000202, #000002
Triadic#020001, #010200
Split complementary#020000, #020200
Tetradic#020002, #020100, #000200
Tints, shades & saturation
Channel breakdown
R0
G1
B2
Red0 (0%)
Green1 (0.4%)
Blue2 (0.8%)
Hue210°
Saturation (HSL)100%
Lightness0.39%
Dominant channelBlue
Hex per channelR 00 · G 01 · B 02
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