13157825 has 12 divisors (see below), whose sum is σ = 16382508. Its totient is φ = 10483200.

The previous prime is 13157821. The next prime is 13157831. The reversal of 13157825 is 52875131.

It can be written as a sum of positive squares in 6 ways, for example, as 1658944 + 11498881 = 1288^2 + 3391^2 .

It is not a de Polignac number, because 13157825 - 2² = 13157821 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13157791 and 13157800.

It is not an unprimeable number, because it can be changed into a prime (13157821) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6089 + ... + 7961.

It is an arithmetic number, because the mean of its divisors is an integer number (1365209).

Almost surely, 2^13157825 is an apocalyptic number.

It is an amenable number.

13157825 is a deficient number, since it is larger than the sum of its proper divisors (3224683).

13157825 is a wasteful number, since it uses less digits than its factorization.

13157825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2164 (or 2159 counting only the distinct ones).

The product of its digits is 8400, while the sum is 32.

The square root of 13157825 is about 3627.3716379770. The cubic root of 13157825 is about 236.0811807761.

The spelling of 13157825 in words is "thirteen million, one hundred fifty-seven thousand, eight hundred twenty-five".