2605564 has 24 divisors (see below), whose sum is σ = 4974480. Its totient is φ = 1186944.

The previous prime is 2605543. The next prime is 2605579. The reversal of 2605564 is 4655062.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4347 + ... + 4909.

It is an arithmetic number, because the mean of its divisors is an integer number (207270).

2^2605564 is an apocalyptic number.

It is an amenable number.

2605564 is a deficient number, since it is larger than the sum of its proper divisors (2368916).

2605564 is a wasteful number, since it uses less digits than its factorization.

2605564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 669 (or 667 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 2605564 is about 1614.1759507563. The cubic root of 2605564 is about 137.6049050667.

The spelling of 2605564 in words is "two million, six hundred five thousand, five hundred sixty-four".