Properties of the Number 124

One Hundred Twenty-Four

Basics

Value: 123 → 124 → 125

Parity: even

Prime: No

Previous Prime: 113

Next Prime: 127

Digit Sum: 7

Digital Root: 7

Palindrome: No

Factorization: 2 ² × 31

Divisors: 1, 2, 4, 31, 62, 124

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1111100

Octal: 174

Duodecimal: A4

Hexadecimal: 7c

Square: 15376

Square Root: 11.135528725660043

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

a(n) = σ(n), the sum of the divisors of n. Also called sigma₁(n). A203

Numbers that are not squarefree. Numbers that are divisible by a square greater than 1. The complement of A005117. A13929

Number of compositions of n such that no two adjacent parts are equal (these are sometimes called Carlitz compositions). A3242

Numbers in base 5. A7091

Odious numbers: numbers with an odd number of 1's in their binary expansion. A69

Numbers that are the product of exactly three (not necessarily distinct) primes. A14612

a(n) = 3·n + 1. A16777

Sum of odd divisors of n. A593

Positive integers which are neither squarefree integers nor prime powers. A126706

The Collatz or 3x+1 map: a(n) = n/2 if n is even, 3n + 1 if n is odd. A6370

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