2564806 has 8 divisors (see below), whose sum is σ = 3910464. Its totient is φ = 1261320.

The previous prime is 2564759. The next prime is 2564813. The reversal of 2564806 is 6084652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10390 + ... + 10633.

It is an arithmetic number, because the mean of its divisors is an integer number (488808).

2^2564806 is an apocalyptic number.

2564806 is a deficient number, since it is larger than the sum of its proper divisors (1345658).

2564806 is a wasteful number, since it uses less digits than its factorization.

2564806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21086.

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 2564806 is about 1601.5011707770. The cubic root of 2564806 is about 136.8836278903.

The spelling of 2564806 in words is "two million, five hundred sixty-four thousand, eight hundred six".