315639 has 12 divisors (see below), whose sum is σ = 482976. Its totient is φ = 197952.

The previous prime is 315631. The next prime is 315643. The reversal of 315639 is 936513.

It is not a de Polignac number, because 315639 - 2³ = 315631 is a prime.

315639 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315631) 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 11 ways as a sum of consecutive naturals, for example, 879 + ... + 1184.

It is an arithmetic number, because the mean of its divisors is an integer number (40248).

2³¹⁵⁶³⁹ is an apocalyptic number.

315639 is a deficient number, since it is larger than the sum of its proper divisors (167337).

315639 is a wasteful number, since it uses less digits than its factorization.

315639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2086 (or 2083 counting only the distinct ones).

The product of its digits is 2430, while the sum is 27.

The square root of 315639 is about 561.8175860544. The cubic root of 315639 is about 68.0868987068.

The spelling of 315639 in words is "three hundred fifteen thousand, six hundred thirty-nine".