2564767 has 4 divisors (see below), whose sum is σ = 2569000. Its totient is φ = 2560536.

The previous prime is 2564759. The next prime is 2564813. The reversal of 2564767 is 7674652.

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 2564767 - 2³ = 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 (2564747) 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, 1017 + ... + 2482.

It is an arithmetic number, because the mean of its divisors is an integer number (642250).

2^2564767 is an apocalyptic number.

2564767 is a deficient number, since it is larger than the sum of its proper divisors (4233).

2564767 is an equidigital number, since it uses as much as digits as its factorization.

2564767 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4232.

The product of its digits is 70560, while the sum is 37.

The square root of 2564767 is about 1601.4889946547. The cubic root of 2564767 is about 136.8829340772.

The spelling of 2564767 in words is "two million, five hundred sixty-four thousand, seven hundred sixty-seven".