102117915 has 20 divisors (see below), whose sum is σ = 183056544. Its totient is φ = 54462672.

The previous prime is 102117857. The next prime is 102117923. The reversal of 102117915 is 519711201.

It is not a de Polignac number, because 102117915 - 2¹⁰ = 102116891 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 125667 + ... + 126476.

Almost surely, 2^102117915 is an apocalyptic number.

102117915 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

102117915 is a deficient number, since it is larger than the sum of its proper divisors (80938629).

102117915 is an equidigital number, since it uses as much as digits as its factorization.

102117915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252160 (or 252151 counting only the distinct ones).

The product of its (nonzero) digits is 630, while the sum is 27.

The square root of 102117915 is about 10105.3409145857. The cubic root of 102117915 is about 467.4128484820.

The spelling of 102117915 in words is "one hundred two million, one hundred seventeen thousand, nine hundred fifteen".