Number
124
- Positive
- Even
- Composite
- 3 digits
124 is an even 3-digit integer and a composite number. It has 6 divisors and a digital root of 7.
Number properties
ParityEvendivisible by 2
SignPositive
PrimalityComposite
Absolute value124
Digit count3
Digit sum7
Digital root7repeated digit sum
PalindromicNoreads differently backwards
Happy numberNosquared-digit sums reach 1
Harshad numberNodivisible by its own digit sum
Factors & divisors
Prime factorisation2^2 × 31
Distinct prime factors22, 31
Number of divisors6
Sum of divisors σ(n)224
Aliquot sum100sum of the proper divisors
ClassificationDeficientthe aliquot sum is less than the number
Euler's totient φ(n)60integers below n that share no factor with it
SquarefreeNohas a repeated prime factor
All divisors1, 2, 4, 31, 62, 1246 in total
Arithmetic
Representations
Decimal124
Binary11111007 bits
Octal174
Hexadecimal7C
Base 363G
Roman numeralCXXIV
In wordsone hundred and twenty-four
Ordinalone hundred and twenty-fourth
Scientific notation1.24 × 10^2
Engineering notation124
Nearest landmarks
Powers & multiples
124 to the power 215,376
124 to the power 31,906,624
124 to the power 4236,421,376
124 to the power 529,316,250,624
First ten multiples124, 248, 372, 496, 620, 744, 868, 992, 1,116, 1,240
Powers of twoBetween 2^6 (64) and 2^7 (128)
Divisibility tests
Divisible by 2Yes
Divisible by 3No, remainder 1
Divisible by 4Yes
Divisible by 5No, remainder 4
Divisible by 6No, remainder 4
Divisible by 7No, remainder 5
Divisible by 8No, remainder 4
Divisible by 9No, remainder 7
Divisible by 10No, remainder 4
Divisible by 11No, remainder 3
Divisible by 12No, remainder 4
Divisible by 100No, remainder 24
Collatz (3n + 1) trajectory
Steps to reach 1108the total stopping time
Reaches 1Yesthe Collatz conjecture says every positive integer does, but it is unproven
First steps124 → 62 → 31 → 94 → 47 → 142 → 71 → 214 → 107 → 322 → …
Last steps… → 5 → 16 → 8 → 4 → 2 → 1
As a percentage & fraction
As a percentage12,400%
124% as a decimal1.24
124% of 100124
124% of 1,0001,240
As a fraction of 100124/100
Read another way
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Derived from 124
Other readings
Also reads as
#112244 (colour)
- #112244
- Blue
- Dark
- Nearest: Black
#112244 is a blue with RGB values 17, 34, 68 and HSL 220°, 60%, 17%. It is a dark colour, so white text on it reaches 15.7:1 contrast (AAA for normal text). The nearest named colour is Black.
Colour values
#112244#112244
HEX#112244
HEX (short)#124
RGBrgb(17, 34, 68)
RGB (0–1)0.0667, 0.1333, 0.2667
RGB percentages6.7%, 13.3%, 26.7%
HSLhsl(220, 60%, 16.7%)
HSV / HSBhsv(220, 75%, 26.7%)
CMYK75%, 50%, 0%, 73.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,122,884
CSS custom property--colour: #112244;
Brightness & contrast
Relative luminance0.01681WCAG 2.x, 0 is black and 1 is white
Perceived brightness35.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 15.72:1
Contrast with white15.72:1WCAG normal text: AAA
Contrast with black1.34:1WCAG normal text: Fail
Greyscale equivalent#212121
Inverted#EEDDBB
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text15.72:1WCAG large text: AAA
Contrast with black, large text1.34:1WCAG large text: Fail
Named colours
Hue familyblue
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#443311
Analogous#113C44, #1A1144
Triadic#441122, #224411
Split complementary#441911, #3B4411
Tetradic#44113B, #443311, #114419
Tints, shades & saturation
Channel breakdown
R17
G34
B68
Red17 (6.7%)
Green34 (13.3%)
Blue68 (26.7%)
Hue220°
Saturation (HSL)60%
Lightness16.67%
Dominant channelBlue
Hex per channelR 11 · G 22 · B 44
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Harmonies
Similar named colours
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