79515 has 32 divisors (see below), whose sum is σ = 153600. Its totient is φ = 38880.

The previous prime is 79493. The next prime is 79531. The reversal of 79515 is 51597.

It is not a de Polignac number, because 79515 - 2⁶ = 79451 is a prime.

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

It is a plaindrome in base 16.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2550 + ... + 2580.

It is an arithmetic number, because the mean of its divisors is an integer number (4800).

2⁷⁹⁵¹⁵ is an apocalyptic number.

79515 is a deficient number, since it is larger than the sum of its proper divisors (74085).

79515 is a wasteful number, since it uses less digits than its factorization.

79515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64 (or 58 counting only the distinct ones).

The product of its digits is 1575, while the sum is 27.

The square root of 79515 is about 281.9840421017. The cubic root of 79515 is about 43.0014421727.

The spelling of 79515 in words is "seventy-nine thousand, five hundred fifteen".