2564401 has 4 divisors (see below), whose sum is σ = 2930752. Its totient is φ = 2198052.

The previous prime is 2564381. The next prime is 2564407. The reversal of 2564401 is 1044652.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2564401 - 2⁵ = 2564369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2564407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 183165 + ... + 183178.

It is an arithmetic number, because the mean of its divisors is an integer number (732688).

2^2564401 is an apocalyptic number.

It is an amenable number.

2564401 is a deficient number, since it is larger than the sum of its proper divisors (366351).

2564401 is an equidigital number, since it uses as much as digits as its factorization.

2564401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366350.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 2564401 is about 1601.3747219186. The cubic root of 2564401 is about 136.8764225647.

The spelling of 2564401 in words is "two million, five hundred sixty-four thousand, four hundred one".