115965915 has 16 divisors (see below), whose sum is σ = 199818528. Its totient is φ = 57090816.

The previous prime is 115965869. The next prime is 115965919. The reversal of 115965915 is 519569511.

It is not a de Polignac number, because 115965915 - 2¹² = 115961819 is a prime.

It is not an unprimeable number, because it can be changed into a prime (115965919) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 297154 + ... + 297543.

It is an arithmetic number, because the mean of its divisors is an integer number (12488658).

Almost surely, 2^115965915 is an apocalyptic number.

115965915 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

115965915 is a deficient number, since it is larger than the sum of its proper divisors (83852613).

115965915 is a wasteful number, since it uses less digits than its factorization.

115965915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 594718.

The product of its digits is 60750, while the sum is 42.

The square root of 115965915 is about 10768.7471416131. The cubic root of 115965915 is about 487.6521234654.

The spelling of 115965915 in words is "one hundred fifteen million, nine hundred sixty-five thousand, nine hundred fifteen".