2564506 has 32 divisors (see below), whose sum is σ = 4792320. Its totient is φ = 1004400.

The previous prime is 2564489. The next prime is 2564519. The reversal of 2564506 is 6054652.

It is a Smith number, since the sum of its digits (28) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8091 + ... + 8401.

It is an arithmetic number, because the mean of its divisors is an integer number (149760).

2^2564506 is an apocalyptic number.

2564506 is a deficient number, since it is larger than the sum of its proper divisors (2227814).

2564506 is a wasteful number, since it uses less digits than its factorization.

2564506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370.

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

The square root of 2564506 is about 1601.4075059147. The cubic root of 2564506 is about 136.8782906849.

The spelling of 2564506 in words is "two million, five hundred sixty-four thousand, five hundred six".