2564791 has 4 divisors (see below), whose sum is σ = 2699800. Its totient is φ = 2429784.

The previous prime is 2564759. The next prime is 2564813. The reversal of 2564791 is 1974652.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2564791 - 2⁵ = 2564759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2564701) 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, 67476 + ... + 67513.

It is an arithmetic number, because the mean of its divisors is an integer number (674950).

2^2564791 is an apocalyptic number.

2564791 is a deficient number, since it is larger than the sum of its proper divisors (135009).

2564791 is a wasteful number, since it uses less digits than its factorization.

2564791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135008.

The product of its digits is 15120, while the sum is 34.

The square root of 2564791 is about 1601.4964876640. The cubic root of 2564791 is about 136.8833610400.

The spelling of 2564791 in words is "two million, five hundred sixty-four thousand, seven hundred ninety-one".