2565878 has 16 divisors (see below), whose sum is σ = 4657824. Its totient is φ = 1034880.

The previous prime is 2565863. The next prime is 2565881. The reversal of 2565878 is 8785652.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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, 5153 + ... + 5628.

It is an arithmetic number, because the mean of its divisors is an integer number (291114).

2^2565878 is an apocalyptic number.

2565878 is a deficient number, since it is larger than the sum of its proper divisors (2091946).

2565878 is a wasteful number, since it uses less digits than its factorization.

2565878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10807.

The product of its digits is 134400, while the sum is 41.

The square root of 2565878 is about 1601.8358217995. The cubic root of 2565878 is about 136.9026961045.

It can be divided in two parts, 2565 and 878, that added together give a palindrome (3443).

The spelling of 2565878 in words is "two million, five hundred sixty-five thousand, eight hundred seventy-eight".