11865715 has 16 divisors (see below), whose sum is σ = 15102720. Its totient is φ = 8933760.

The previous prime is 11865713. The next prime is 11865739. The reversal of 11865715 is 51756811.

It is not a de Polignac number, because 11865715 - 2¹ = 11865713 is a prime.

It is a super-2 number, since 2×11865715² = 281590384922450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11865713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4701 + ... + 6769.

It is an arithmetic number, because the mean of its divisors is an integer number (943920).

Almost surely, 2^11865715 is an apocalyptic number.

11865715 is a deficient number, since it is larger than the sum of its proper divisors (3237005).

11865715 is a wasteful number, since it uses less digits than its factorization.

11865715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2142.

The product of its digits is 8400, while the sum is 34.

The square root of 11865715 is about 3444.6647151791. The cubic root of 11865715 is about 228.0856544391.

The spelling of 11865715 in words is "eleven million, eight hundred sixty-five thousand, seven hundred fifteen".