123157904 has 20 divisors (see below), whose sum is σ = 245068764. Its totient is φ = 59914368.

The previous prime is 123157897. The next prime is 123157913. The reversal of 123157904 is 409751321.

It can be written as a sum of positive squares in 2 ways, for example, as 42876304 + 80281600 = 6548^2 + 8960^2 .

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103427 + ... + 104610.

Almost surely, 2^123157904 is an apocalyptic number.

It is an amenable number.

123157904 is a deficient number, since it is larger than the sum of its proper divisors (121910860).

123157904 is a wasteful number, since it uses less digits than its factorization.

123157904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208082 (or 208076 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 123157904 is about 11097.6530852248. The cubic root of 123157904 is about 497.5317071111.

The spelling of 123157904 in words is "one hundred twenty-three million, one hundred fifty-seven thousand, nine hundred four".