2656865 has 8 divisors (see below), whose sum is σ = 3356160. Its totient is φ = 2013552.

The previous prime is 2656861. The next prime is 2656867. The reversal of 2656865 is 5686562.

It is a happy number.

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 2656865 - 2² = 2656861 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2656861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13889 + ... + 14078.

It is an arithmetic number, because the mean of its divisors is an integer number (419520).

2^2656865 is an apocalyptic number.

It is an amenable number.

2656865 is a deficient number, since it is larger than the sum of its proper divisors (699295).

2656865 is a wasteful number, since it uses less digits than its factorization.

2656865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27991.

The product of its digits is 86400, while the sum is 38.

The square root of 2656865 is about 1629.9892637683. The cubic root of 2656865 is about 138.5021438759.

The spelling of 2656865 in words is "two million, six hundred fifty-six thousand, eight hundred sixty-five".