2564859 has 8 divisors (see below), whose sum is σ = 3730752. Its totient is φ = 1554440.

The previous prime is 2564857. The next prime is 2564899. The reversal of 2564859 is 9584652.

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

It is a cyclic number.

It is not a de Polignac number, because 2564859 - 2¹ = 2564857 is a prime.

It is a d-powerful number, because it can be written as 2¹⁹ + 5⁷ + 6⁵ + 4⁵ + 8³ + 5⁹ + 9 .

2564859 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2564857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38829 + ... + 38894.

It is an arithmetic number, because the mean of its divisors is an integer number (466344).

2^2564859 is an apocalyptic number.

2564859 is a deficient number, since it is larger than the sum of its proper divisors (1165893).

2564859 is a wasteful number, since it uses less digits than its factorization.

2564859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77737.

The product of its digits is 86400, while the sum is 39.

The square root of 2564859 is about 1601.5177176666. The cubic root of 2564859 is about 136.8845707534.

It can be divided in two parts, 256 and 4859, that added together give a palindrome (5115).

The spelling of 2564859 in words is "two million, five hundred sixty-four thousand, eight hundred fifty-nine".