117915 has 16 divisors (see below), whose sum is σ = 215808. Its totient is φ = 53856.

The previous prime is 117911. The next prime is 117917. The reversal of 117915 is 519711.

It is not a de Polignac number, because 117915 - 2² = 117911 is a prime.

It is not an unprimeable number, because it can be changed into a prime (117911) 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, 457 + ... + 666.

It is an arithmetic number, because the mean of its divisors is an integer number (13488).

2¹¹⁷⁹¹⁵ is an apocalyptic number.

117915 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

117915 is a deficient number, since it is larger than the sum of its proper divisors (97893).

117915 is a wasteful number, since it uses less digits than its factorization.

117915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1138.

The product of its digits is 315, while the sum is 24.

The square root of 117915 is about 343.3875361745. The cubic root of 117915 is about 49.0369012605.

The spelling of 117915 in words is "one hundred seventeen thousand, nine hundred fifteen".