85615 has 4 divisors (see below), whose sum is σ = 102744. Its totient is φ = 68488.

The previous prime is 85607. The next prime is 85619. The reversal of 85615 is 51658.

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 85615 - 2³ = 85607 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 85615.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85619) by changing a digit.

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, 8557 + ... + 8566.

It is an arithmetic number, because the mean of its divisors is an integer number (25686).

2⁸⁵⁶¹⁵ is an apocalyptic number.

85615 is a deficient number, since it is larger than the sum of its proper divisors (17129).

85615 is a wasteful number, since it uses less digits than its factorization.

85615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17128.

The product of its digits is 1200, while the sum is 25.

The square root of 85615 is about 292.6004101159. The cubic root of 85615 is about 44.0740831845.

The spelling of 85615 in words is "eighty-five thousand, six hundred fifteen".