2565564 has 24 divisors (see below), whose sum is σ = 6077568. Its totient is φ = 842160.

The previous prime is 2565559. The next prime is 2565569. The reversal of 2565564 is 4655652.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2565559) and next prime (2565569).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2565569) 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, 792 + ... + 2399.

It is an arithmetic number, because the mean of its divisors is an integer number (253232).

2^2565564 is an apocalyptic number.

It is an amenable number.

2565564 is an abundant number, since it is smaller than the sum of its proper divisors (3512004).

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

2565564 is a wasteful number, since it uses less digits than its factorization.

2565564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3265 (or 3263 counting only the distinct ones).

The product of its digits is 36000, while the sum is 33.

The square root of 2565564 is about 1601.7378062592. The cubic root of 2565564 is about 136.8971113754.

The spelling of 2565564 in words is "two million, five hundred sixty-five thousand, five hundred sixty-four".