315139 has 4 divisors (see below), whose sum is σ = 343800. Its totient is φ = 286480.

The previous prime is 315127. The next prime is 315179. The reversal of 315139 is 931513.

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 315139 - 2⁷ = 315011 is a prime.

It is a Duffinian number.

315139 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (315109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14314 + ... + 14335.

It is an arithmetic number, because the mean of its divisors is an integer number (85950).

2³¹⁵¹³⁹ is an apocalyptic number.

315139 is a deficient number, since it is larger than the sum of its proper divisors (28661).

315139 is a wasteful number, since it uses less digits than its factorization.

315139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28660.

The product of its digits is 405, while the sum is 22.

The square root of 315139 is about 561.3724254005. The cubic root of 315139 is about 68.0509278233.

It can be divided in two parts, 315 and 139, that added together give a palindrome (454).

The spelling of 315139 in words is "three hundred fifteen thousand, one hundred thirty-nine".