157145725 has 18 divisors (see below), whose sum is σ = 214189850. Its totient is φ = 114285600.

The previous prime is 157145717. The next prime is 157145731. The reversal of 157145725 is 527541751.

It can be written as a sum of positive squares in 3 ways, for example, as 1545049 + 155600676 = 1243^2 + 12474^2 .

It is not a de Polignac number, because 157145725 - 2³ = 157145717 is a prime.

It is a super-3 number, since 3×157145725³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 22950 + ... + 28999.

Almost surely, 2^157145725 is an apocalyptic number.

It is an amenable number.

157145725 is a deficient number, since it is larger than the sum of its proper divisors (57044125).

157145725 is a wasteful number, since it uses less digits than its factorization.

157145725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51981 (or 51965 counting only the distinct ones).

The product of its digits is 49000, while the sum is 37.

The square root of 157145725 is about 12535.7777979669. Note that the first 4 decimals coincide. The cubic root of 157145725 is about 539.6359285785.

The spelling of 157145725 in words is "one hundred fifty-seven million, one hundred forty-five thousand, seven hundred twenty-five".