2565251 has 12 divisors (see below), whose sum is σ = 2850408. Its totient is φ = 2306304.

The previous prime is 2565239. The next prime is 2565257. The reversal of 2565251 is 1525652.

It is a de Polignac number, because none of the positive numbers 2^k-2565251 is a prime.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2565251.

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 in 11 ways as a sum of consecutive naturals, for example, 7091 + ... + 7443.

It is an arithmetic number, because the mean of its divisors is an integer number (237534).

2^2565251 is an apocalyptic number.

2565251 is a deficient number, since it is larger than the sum of its proper divisors (285157).

2565251 is a wasteful number, since it uses less digits than its factorization.

2565251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422 (or 409 counting only the distinct ones).

The product of its digits is 3000, while the sum is 26.

The square root of 2565251 is about 1601.6400969007. The cubic root of 2565251 is about 136.8915439786.

The spelling of 2565251 in words is "two million, five hundred sixty-five thousand, two hundred fifty-one".