124172939 has 4 divisors (see below), whose sum is σ = 135461400. Its totient is φ = 112884480.

The previous prime is 124172933. The next prime is 124172941. The reversal of 124172939 is 939271421.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 124172939 - 2¹² = 124168843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (124172933) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5644214 + ... + 5644235.

It is an arithmetic number, because the mean of its divisors is an integer number (33865350).

Almost surely, 2^124172939 is an apocalyptic number.

124172939 is a deficient number, since it is larger than the sum of its proper divisors (11288461).

124172939 is a wasteful number, since it uses less digits than its factorization.

124172939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11288460.

The product of its digits is 27216, while the sum is 38.

The square root of 124172939 is about 11143.2912104100. The cubic root of 124172939 is about 498.8948109141.

The spelling of 124172939 in words is "one hundred twenty-four million, one hundred seventy-two thousand, nine hundred thirty-nine".