315925 has 6 divisors (see below), whose sum is σ = 391778. Its totient is φ = 252720.

The previous prime is 315907. The next prime is 315937. The reversal of 315925 is 529513.

It can be written as a sum of positive squares in 3 ways, for example, as 81 + 315844 = 9^2 + 562^2 .

It is not a de Polignac number, because 315925 - 2⁵ = 315893 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 12637 = 315925 / (3 + 1 + 5 + 9 + 2 + 5).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 315925.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6294 + ... + 6343.

2³¹⁵⁹²⁵ is an apocalyptic number.

It is an amenable number.

315925 is a deficient number, since it is larger than the sum of its proper divisors (75853).

315925 is a wasteful number, since it uses less digits than its factorization.

315925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12647 (or 12642 counting only the distinct ones).

The product of its digits is 1350, while the sum is 25.

The square root of 315925 is about 562.0720594372. The cubic root of 315925 is about 68.1074569760.

The spelling of 315925 in words is "three hundred fifteen thousand, nine hundred twenty-five".