315865 has 8 divisors (see below), whose sum is σ = 413568. Its totient is φ = 229680.

The previous prime is 315857. The next prime is 315881. The reversal of 315865 is 568513.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 315865 - 2³ = 315857 is a prime.

It is a Duffinian number.

315865 is a lucky number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2817 + ... + 2926.

It is an arithmetic number, because the mean of its divisors is an integer number (51696).

2³¹⁵⁸⁶⁵ is an apocalyptic number.

It is an amenable number.

315865 is a deficient number, since it is larger than the sum of its proper divisors (97703).

315865 is a wasteful number, since it uses less digits than its factorization.

315865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5759.

The product of its digits is 3600, while the sum is 28.

The square root of 315865 is about 562.0186829635. The cubic root of 315865 is about 68.1031450811.

It can be divided in two parts, 3158 and 65, that added together give a palindrome (3223).

The spelling of 315865 in words is "three hundred fifteen thousand, eight hundred sixty-five".