2560865 has 12 divisors (see below), whose sum is σ = 3157524. Its totient is φ = 1993824.

The previous prime is 2560849. The next prime is 2560871. The reversal of 2560865 is 5680652.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 667489 + 1893376 = 817^2 + 1376^2 .

It is not a de Polignac number, because 2560865 - 2⁴ = 2560849 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9107 + ... + 9383.

It is an arithmetic number, because the mean of its divisors is an integer number (263127).

2^2560865 is an apocalyptic number.

It is an amenable number.

2560865 is a deficient number, since it is larger than the sum of its proper divisors (596659).

2560865 is an equidigital number, since it uses as much as digits as its factorization.

2560865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368 (or 325 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 2560865 is about 1600.2702896698. The cubic root of 2560865 is about 136.8134815949.

The spelling of 2560865 in words is "two million, five hundred sixty thousand, eight hundred sixty-five".