2565256 has 8 divisors (see below), whose sum is σ = 4809870. Its totient is φ = 1282624.

The previous prime is 2565239. The next prime is 2565257. The reversal of 2565256 is 6525652.

It can be written as a sum of positive squares in only one way, i.e., 2280100 + 285156 = 1510^2 + 534^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2565257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160321 + ... + 160336.

2^2565256 is an apocalyptic number.

It is an amenable number.

2565256 is a deficient number, since it is larger than the sum of its proper divisors (2244614).

2565256 is a wasteful number, since it uses less digits than its factorization.

2565256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320663 (or 320659 counting only the distinct ones).

The product of its digits is 18000, while the sum is 31.

The square root of 2565256 is about 1601.6416577999. The cubic root of 2565256 is about 136.8916329182.

The spelling of 2565256 in words is "two million, five hundred sixty-five thousand, two hundred fifty-six".