2564439 has 8 divisors (see below), whose sum is σ = 3442800. Its totient is φ = 1697856.

The previous prime is 2564423. The next prime is 2564447. The reversal of 2564439 is 9344652.

2564439 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.

It is not a de Polignac number, because 2564439 - 2⁴ = 2564423 is a prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 2¹⁵ + 5⁹ + 6⁵ + 4⁷ + 4⁷ + 3¹² + 9⁴ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2564459) 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 7 ways as a sum of consecutive naturals, for example, 2422 + ... + 3315.

It is an arithmetic number, because the mean of its divisors is an integer number (430350).

2^2564439 is an apocalyptic number.

2564439 is a deficient number, since it is larger than the sum of its proper divisors (878361).

2564439 is a wasteful number, since it uses less digits than its factorization.

2564439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5889.

The product of its digits is 25920, while the sum is 33.

The square root of 2564439 is about 1601.3865866804. The cubic root of 2564439 is about 136.8770986522.

It can be divided in two parts, 2564 and 439, that added together give a palindrome (3003).

The spelling of 2564439 in words is "two million, five hundred sixty-four thousand, four hundred thirty-nine".