2915865 has 16 divisors (see below), whose sum is σ = 5184000. Its totient is φ = 1555056.

The previous prime is 2915849. The next prime is 2915893. The reversal of 2915865 is 5685192.

It is a happy number.

2915865 is nontrivially palindromic in base 8.

It is not a de Polignac number, because 2915865 - 2⁴ = 2915849 is a prime.

2915865 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10665 + ... + 10934.

It is an arithmetic number, because the mean of its divisors is an integer number (324000).

2^2915865 is an apocalyptic number.

It is an amenable number.

2915865 is a deficient number, since it is larger than the sum of its proper divisors (2268135).

2915865 is a wasteful number, since it uses less digits than its factorization.

2915865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21613 (or 21607 counting only the distinct ones).

The product of its digits is 21600, while the sum is 36.

The square root of 2915865 is about 1707.5904075627. The cubic root of 2915865 is about 142.8638899194.

The spelling of 2915865 in words is "two million, nine hundred fifteen thousand, eight hundred sixty-five".