13056257 has 8 divisors (see below), whose sum is σ = 13351080. Its totient is φ = 12764160.

The previous prime is 13056229. The next prime is 13056311. The reversal of 13056257 is 75265031.

It can be written as a sum of positive squares in 4 ways, for example, as 1739761 + 11316496 = 1319^2 + 3364^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13056257 - 2¹⁰ = 13055233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13059257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11219 + ... + 12327.

It is an arithmetic number, because the mean of its divisors is an integer number (1668885).

Almost surely, 2^13056257 is an apocalyptic number.

It is an amenable number.

13056257 is a deficient number, since it is larger than the sum of its proper divisors (294823).

13056257 is a wasteful number, since it uses less digits than its factorization.

13056257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1363.

The product of its (nonzero) digits is 6300, while the sum is 29.

The square root of 13056257 is about 3613.3442958013. The cubic root of 13056257 is about 235.4721577006.

The spelling of 13056257 in words is "thirteen million, fifty-six thousand, two hundred fifty-seven".