11915965 has 16 divisors (see below), whose sum is σ = 14676480. Its totient is φ = 9285120.

The previous prime is 11915933. The next prime is 11915999. The reversal of 11915965 is 56951911.

It is not a de Polignac number, because 11915965 - 2⁵ = 11915933 is a prime.

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, 38160 + ... + 38470.

It is an arithmetic number, because the mean of its divisors is an integer number (917280).

Almost surely, 2^11915965 is an apocalyptic number.

It is an amenable number.

11915965 is a deficient number, since it is larger than the sum of its proper divisors (2760515).

11915965 is an equidigital number, since it uses as much as digits as its factorization.

11915965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492.

The product of its digits is 12150, while the sum is 37.

The square root of 11915965 is about 3451.9508976809. The cubic root of 11915965 is about 228.4071735657.

It can be divided in two parts, 11915 and 965, that added together give a triangular number (12880 = T₁₆₀).

The spelling of 11915965 in words is "eleven million, nine hundred fifteen thousand, nine hundred sixty-five".