85915 has 4 divisors (see below), whose sum is σ = 103104. Its totient is φ = 68728.

The previous prime is 85909. The next prime is 85931. The reversal of 85915 is 51958.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 85915 - 2¹³ = 77723 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a plaindrome in base 14.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8587 + ... + 8596.

It is an arithmetic number, because the mean of its divisors is an integer number (25776).

2⁸⁵⁹¹⁵ is an apocalyptic number.

85915 is a deficient number, since it is larger than the sum of its proper divisors (17189).

85915 is a wasteful number, since it uses less digits than its factorization.

85915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17188.

The product of its digits is 1800, while the sum is 28.

The square root of 85915 is about 293.1126063478. The cubic root of 85915 is about 44.1255025663.

It can be divided in two parts, 85 and 915, that added together give a cube (1000 = 10³).

The spelling of 85915 in words is "eighty-five thousand, nine hundred fifteen".