13257057 has 16 divisors (see below), whose sum is σ = 19906560. Its totient is φ = 7774800.

The previous prime is 13257043. The next prime is 13257061. The reversal of 13257057 is 75075231.

It is not a de Polignac number, because 13257057 - 2⁸ = 13256801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13257007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5457 + ... + 7502.

It is an arithmetic number, because the mean of its divisors is an integer number (1244160).

Almost surely, 2^13257057 is an apocalyptic number.

It is an amenable number.

13257057 is a deficient number, since it is larger than the sum of its proper divisors (6649503).

13257057 is a wasteful number, since it uses less digits than its factorization.

13257057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13004.

The product of its (nonzero) digits is 7350, while the sum is 30.

The square root of 13257057 is about 3641.0241691041. The cubic root of 13257057 is about 236.6731773209.

The spelling of 13257057 in words is "thirteen million, two hundred fifty-seven thousand, fifty-seven".