2581164 has 18 divisors (see below), whose sum is σ = 6524700. Its totient is φ = 860376.

The previous prime is 2581147. The next prime is 2581171. The reversal of 2581164 is 4611852.

2581164 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 35814 + ... + 35885.

2^2581164 is an apocalyptic number.

It is an amenable number.

2581164 is an abundant number, since it is smaller than the sum of its proper divisors (3943536).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2581164 is a wasteful number, since it uses less digits than its factorization.

2581164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71709 (or 71704 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 2581164 is about 1606.6001369351. The cubic root of 2581164 is about 137.1740200761.

The spelling of 2581164 in words is "two million, five hundred eighty-one thousand, one hundred sixty-four".