13390625 has 14 divisors (see below), whose sum is σ = 16757598. Its totient is φ = 10700000.

The previous prime is 13390621. The next prime is 13390631. The reversal of 13390625 is 52609331.

It can be written as a sum of positive squares in 7 ways, for example, as 12737761 + 652864 = 3569^2 + 808^2 .

It is not a de Polignac number, because 13390625 - 2² = 13390621 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (13390621) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 15197 + ... + 16053.

Almost surely, 2^13390625 is an apocalyptic number.

It is an amenable number.

13390625 is a deficient number, since it is larger than the sum of its proper divisors (3366973).

13390625 is an frugal number, since it uses more digits than its factorization.

13390625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 887 (or 862 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 29.

The square root of 13390625 is about 3659.3202920761. The cubic root of 13390625 is about 237.4653689117.

Adding to 13390625 its reverse (52609331), we get a palindrome (65999956).

The spelling of 13390625 in words is "thirteen million, three hundred ninety thousand, six hundred twenty-five".