2565868 has 6 divisors (see below), whose sum is σ = 4490276. Its totient is φ = 1282932.

The previous prime is 2565863. The next prime is 2565881. The reversal of 2565868 is 8685652.

It is a self number, because there is not a number n which added to its sum of digits gives 2565868.

It is not an unprimeable number, because it can be changed into a prime (2565863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320730 + ... + 320737.

2^2565868 is an apocalyptic number.

It is an amenable number.

2565868 is a deficient number, since it is larger than the sum of its proper divisors (1924408).

2565868 is a wasteful number, since it uses less digits than its factorization.

2565868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 641471 (or 641469 counting only the distinct ones).

The product of its digits is 115200, while the sum is 40.

The square root of 2565868 is about 1601.8327003779. The cubic root of 2565868 is about 136.9025182539.

The spelling of 2565868 in words is "two million, five hundred sixty-five thousand, eight hundred sixty-eight".