13865256 has 40 divisors (see below), whose sum is σ = 38837370. Its totient is φ = 4621536.

The previous prime is 13865237. The next prime is 13865261. The reversal of 13865256 is 65256831.

It can be written as a sum of positive squares in only one way, i.e., 7784100 + 6081156 = 2790^2 + 2466^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 13865256.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 10051 + ... + 11346.

Almost surely, 2^13865256 is an apocalyptic number.

It is an amenable number.

13865256 is an abundant number, since it is smaller than the sum of its proper divisors (24972114).

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

13865256 is a wasteful number, since it uses less digits than its factorization.

13865256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21415 (or 21402 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 13865256 is about 3723.6079278034. The cubic root of 13865256 is about 240.2385128865.

The spelling of 13865256 in words is "thirteen million, eight hundred sixty-five thousand, two hundred fifty-six".