2521564 has 6 divisors (see below), whose sum is σ = 4412744. Its totient is φ = 1260780.

The previous prime is 2521537. The next prime is 2521591. The reversal of 2521564 is 4651252.

It is an interprime number because it is at equal distance from previous prime (2521537) and next prime (2521591).

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 as a sum of consecutive naturals, namely, 315192 + ... + 315199.

2^2521564 is an apocalyptic number.

It is an amenable number.

2521564 is a deficient number, since it is larger than the sum of its proper divisors (1891180).

2521564 is a wasteful number, since it uses less digits than its factorization.

2521564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 630395 (or 630393 counting only the distinct ones).

The product of its digits is 2400, while the sum is 25.

The square root of 2521564 is about 1587.9433239256. The cubic root of 2521564 is about 136.1099888781.

The spelling of 2521564 in words is "two million, five hundred twenty-one thousand, five hundred sixty-four".