2565138 has 8 divisors (see below), whose sum is σ = 5130288. Its totient is φ = 855044.

The previous prime is 2565109. The next prime is 2565139. The reversal of 2565138 is 8315652.

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

2565138 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (2565139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 213756 + ... + 213767.

It is an arithmetic number, because the mean of its divisors is an integer number (641286).

2^2565138 is an apocalyptic number.

2565138 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.

2565138 is a wasteful number, since it uses less digits than its factorization.

2565138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427528.

The product of its digits is 7200, while the sum is 30.

The square root of 2565138 is about 1601.6048201726. The cubic root of 2565138 is about 136.8895339126.

The spelling of 2565138 in words is "two million, five hundred sixty-five thousand, one hundred thirty-eight".