2564538 has 8 divisors (see below), whose sum is σ = 5129088. Its totient is φ = 854844.

The previous prime is 2564521. The next prime is 2564539. The reversal of 2564538 is 8354652.

2564538 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

2564538 is an admirable number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2564499 and 2564508.

It is not an unprimeable number, because it can be changed into a prime (2564539) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 213706 + ... + 213717.

It is an arithmetic number, because the mean of its divisors is an integer number (641136).

2^2564538 is an apocalyptic number.

2564538 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2564538 is a wasteful number, since it uses less digits than its factorization.

2564538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427428.

The product of its digits is 28800, while the sum is 33.

The square root of 2564538 is about 1601.4174970944. The cubic root of 2564538 is about 136.8788600067.

The spelling of 2564538 in words is "two million, five hundred sixty-four thousand, five hundred thirty-eight".