2256865 has 8 divisors (see below), whose sum is σ = 2916648. Its totient is φ = 1666560.

The previous prime is 2256857. The next prime is 2256887. The reversal of 2256865 is 5686522.

It can be written as a sum of positive squares in 4 ways, for example, as 63504 + 2193361 = 252^2 + 1481^2 .

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

It is not a de Polignac number, because 2256865 - 2³ = 2256857 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2256865.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17296 + ... + 17425.

It is an arithmetic number, because the mean of its divisors is an integer number (364581).

2^2256865 is an apocalyptic number.

It is an amenable number.

2256865 is a deficient number, since it is larger than the sum of its proper divisors (659783).

2256865 is a wasteful number, since it uses less digits than its factorization.

2256865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34739.

The product of its digits is 28800, while the sum is 34.

The square root of 2256865 is about 1502.2865905013. The cubic root of 2256865 is about 131.1702039528.

The spelling of 2256865 in words is "two million, two hundred fifty-six thousand, eight hundred sixty-five".