13257564 has 12 divisors (see below), whose sum is σ = 30934344. Its totient is φ = 4419184.

The previous prime is 13257533. The next prime is 13257577. The reversal of 13257564 is 46575231.

13257564 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 552387 + ... + 552410.

It is an arithmetic number, because the mean of its divisors is an integer number (2577862).

Almost surely, 2^13257564 is an apocalyptic number.

It is an amenable number.

13257564 is an abundant number, since it is smaller than the sum of its proper divisors (17676780).

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

13257564 is a wasteful number, since it uses less digits than its factorization.

13257564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1104804 (or 1104802 counting only the distinct ones).

The product of its digits is 25200, while the sum is 33.

The square root of 13257564 is about 3641.0937917060. The cubic root of 13257564 is about 236.6761943750.

The spelling of 13257564 in words is "thirteen million, two hundred fifty-seven thousand, five hundred sixty-four".