2256665 has 16 divisors (see below), whose sum is σ = 2903040. Its totient is φ = 1678080.

The previous prime is 2256637. The next prime is 2256673. The reversal of 2256665 is 5666522.

2256665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2256665 - 2⁶ = 2256601 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11720 + ... + 11910.

It is an arithmetic number, because the mean of its divisors is an integer number (181440).

2^2256665 is an apocalyptic number.

It is an amenable number.

2256665 is a deficient number, since it is larger than the sum of its proper divisors (646375).

2256665 is a wasteful number, since it uses less digits than its factorization.

2256665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352.

The product of its digits is 21600, while the sum is 32.

The square root of 2256665 is about 1502.2200238314. The cubic root of 2256665 is about 131.1663291359.

The spelling of 2256665 in words is "two million, two hundred fifty-six thousand, six hundred sixty-five".