2564539 has 2 divisors, whose sum is σ = 2564540. Its totient is φ = 2564538.

The previous prime is 2564521. The next prime is 2564561. The reversal of 2564539 is 9354652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2564539 - 2⁹ = 2564027 is a prime.

It is not a weakly prime, because it can be changed into another prime (2564519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1282269 + 1282270.

It is an arithmetic number, because the mean of its divisors is an integer number (1282270).

2^2564539 is an apocalyptic number.

2564539 is a deficient number, since it is larger than the sum of its proper divisors (1).

2564539 is an equidigital number, since it uses as much as digits as its factorization.

2564539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32400, while the sum is 34.

The square root of 2564539 is about 1601.4178093177. The cubic root of 2564539 is about 136.8788777979.

The spelling of 2564539 in words is "two million, five hundred sixty-four thousand, five hundred thirty-nine".