124 (number)

124 (one hundred [and] twenty-four) is the natural number following 123 and preceding 125.

123 124 125
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Cardinalone hundred twenty-four
Ordinal124th
(one hundred twenty-fourth)
Factorization22 × 31
Divisors1, 2, 4, 31, 62, 124
Greek numeralΡΚΔ´
Roman numeralCXXIV
Binary11111002
Ternary111213
Octal1748
DuodecimalA412
Hexadecimal7C16

In mathematics

124 is the sum of eight consecutive primes (5 + 7 + 11 + 13 + 17 + 19 + 23 + 29). It is a nontotient since there is no integer with 124 coprimes below it. It is an untouchable number since there is no integer whose proper divisors add up to 124.[1]

In base 5 it is a repdigit (4445).

In the military

In transportation

In other fields

124 is also:

See also

References

  1. "Sloane's A005114 : Untouchable numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved May 27, 2016.
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