2564923 has 4 divisors (see below), whose sum is σ = 2568240. Its totient is φ = 2561608.

The previous prime is 2564921. The next prime is 2564957. The reversal of 2564923 is 3294652.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2564923 - 2¹ = 2564921 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a d-powerful number, because it can be written as 2⁵ + 5⁹ + 6² + 4⁸ + 9⁴ + 2¹³ + 3¹² .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2564921) 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, 186 + ... + 2272.

It is an arithmetic number, because the mean of its divisors is an integer number (642060).

2^2564923 is an apocalyptic number.

2564923 is a deficient number, since it is larger than the sum of its proper divisors (3317).

2564923 is a wasteful number, since it uses less digits than its factorization.

2564923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3316.

The product of its digits is 12960, while the sum is 31.

The square root of 2564923 is about 1601.5376985885. The cubic root of 2564923 is about 136.8857092877.

The spelling of 2564923 in words is "two million, five hundred sixty-four thousand, nine hundred twenty-three".