2561164 has 12 divisors (see below), whose sum is σ = 4636800. Its totient is φ = 1236368.

The previous prime is 2561159. The next prime is 2561179. The reversal of 2561164 is 4611652.

It is a super-2 number, since 2×2561164² = 13119122069792, which contains 22 as substring.

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, 10924 + ... + 11155.

It is an arithmetic number, because the mean of its divisors is an integer number (386400).

2^2561164 is an apocalyptic number.

It is an amenable number.

2561164 is a deficient number, since it is larger than the sum of its proper divisors (2075636).

2561164 is a wasteful number, since it uses less digits than its factorization.

2561164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22112 (or 22110 counting only the distinct ones).

The product of its digits is 1440, while the sum is 25.

The square root of 2561164 is about 1600.3637086613. The cubic root of 2561164 is about 136.8188060509.

The spelling of 2561164 in words is "two million, five hundred sixty-one thousand, one hundred sixty-four".