2565261 has 12 divisors (see below), whose sum is σ = 3768960. Its totient is φ = 1680840.

The previous prime is 2565257. The next prime is 2565263. The reversal of 2565261 is 1625652.

2565261 is a `hidden beast` number, since 2 + 5 + 652 + 6 + 1 = 666.

It is not a de Polignac number, because 2565261 - 2² = 2565257 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2565263) 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, 1885 + ... + 2946.

It is an arithmetic number, because the mean of its divisors is an integer number (314080).

2^2565261 is an apocalyptic number.

It is an amenable number.

2565261 is a deficient number, since it is larger than the sum of its proper divisors (1203699).

2565261 is a wasteful number, since it uses less digits than its factorization.

2565261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4896 (or 4893 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 2565261 is about 1601.6432186976. The cubic root of 2565261 is about 136.8917218577.

The spelling of 2565261 in words is "two million, five hundred sixty-five thousand, two hundred sixty-one".