2564559 has 12 divisors (see below), whose sum is σ = 3760536. Its totient is φ = 1683792.

The previous prime is 2564539. The next prime is 2564561. The reversal of 2564559 is 9554652.

2564559 is a `hidden beast` number, since 2 + 5 + 645 + 5 + 9 = 666.

It is not a de Polignac number, because 2564559 - 2¹⁶ = 2499023 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2564519) 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, 1524 + ... + 2729.

It is an arithmetic number, because the mean of its divisors is an integer number (313378).

2^2564559 is an apocalyptic number.

2564559 is a deficient number, since it is larger than the sum of its proper divisors (1195977).

2564559 is a wasteful number, since it uses less digits than its factorization.

2564559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4326 (or 4323 counting only the distinct ones).

The product of its digits is 54000, while the sum is 36.

The square root of 2564559 is about 1601.4240537721. The cubic root of 2564559 is about 136.8792336215.

The spelling of 2564559 in words is "two million, five hundred sixty-four thousand, five hundred fifty-nine".