2564978 has 16 divisors (see below), whose sum is σ = 4233600. Its totient is φ = 1158096.

The previous prime is 2564957. The next prime is 2564999. The reversal of 2564978 is 8794652.

2564978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2564957) and next prime (2564999).

It is a super-2 number, since 2×2564978² = 13158224280968, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 173 + ... + 2271.

It is an arithmetic number, because the mean of its divisors is an integer number (264600).

2^2564978 is an apocalyptic number.

2564978 is a deficient number, since it is larger than the sum of its proper divisors (1668622).

2564978 is a wasteful number, since it uses less digits than its factorization.

2564978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2161.

The product of its digits is 120960, while the sum is 41.

The square root of 2564978 is about 1601.5548694940. The cubic root of 2564978 is about 136.8866877004.

The spelling of 2564978 in words is "two million, five hundred sixty-four thousand, nine hundred seventy-eight".