157172925 has 48 divisors (see below), whose sum is σ = 319840640. Its totient is φ = 66320640.

The previous prime is 157172903. The next prime is 157172933. The reversal of 157172925 is 529271751.

It is a happy number.

It is not a de Polignac number, because 157172925 - 2⁶ = 157172861 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4690 + ... + 18339.

Almost surely, 2^157172925 is an apocalyptic number.

157172925 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

157172925 is an abundant number, since it is smaller than the sum of its proper divisors (162667715).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

157172925 is a wasteful number, since it uses less digits than its factorization.

157172925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23062 (or 23057 counting only the distinct ones).

The product of its digits is 44100, while the sum is 39.

The square root of 157172925 is about 12536.8626458137. The cubic root of 157172925 is about 539.6670615720.

The spelling of 157172925 in words is "one hundred fifty-seven million, one hundred seventy-two thousand, nine hundred twenty-five".