124 (number)

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← 123 124 125 →
Cardinal one hundred twenty-four
Ordinal 124th
(one hundred twenty-fourth)
Factorization 22× 31
Divisors 1, 2, 4, 31, 62, 124
Greek numeral ΡΚΔ´
Roman numeral CXXIV
Binary 11111002
Ternary 111213
Quaternary 13304
Quinary 4445
Senary 3246
Octal 1748
Duodecimal A412
Hexadecimal 7C16
Vigesimal 6420
Base 36 3G36

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

In mathematics[edit]

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[edit]

In transportation[edit]

In other fields[edit]

124 is also:

See also[edit]

References[edit]

  1. ^ "Sloane's A005114 : Untouchable numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-27.