315705 has 16 divisors (see below), whose sum is σ = 544320. Its totient is φ = 155328.

The previous prime is 315703. The next prime is 315739. The reversal of 315705 is 507513.

It is a happy number.

It is not a de Polignac number, because 315705 - 2¹ = 315703 is a prime.

315705 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (315701) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 615 + ... + 1004.

It is an arithmetic number, because the mean of its divisors is an integer number (34020).

2³¹⁵⁷⁰⁵ is an apocalyptic number.

It is an amenable number.

315705 is a deficient number, since it is larger than the sum of its proper divisors (228615).

315705 is a wasteful number, since it uses less digits than its factorization.

315705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1640.

The product of its (nonzero) digits is 525, while the sum is 21.

The square root of 315705 is about 561.8763209106. The cubic root of 315705 is about 68.0916440247.

The spelling of 315705 in words is "three hundred fifteen thousand, seven hundred five".