315123 has 8 divisors (see below), whose sum is σ = 438528. Its totient is φ = 200904.

The previous prime is 315109. The next prime is 315127. The reversal of 315123 is 321513.

It is a happy number.

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

It is not a de Polignac number, because 315123 - 2⁶ = 315059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (315127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2215 + ... + 2352.

It is an arithmetic number, because the mean of its divisors is an integer number (54816).

2³¹⁵¹²³ is an apocalyptic number.

315123 is a deficient number, since it is larger than the sum of its proper divisors (123405).

315123 is a wasteful number, since it uses less digits than its factorization.

315123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4593.

The product of its digits is 90, while the sum is 15.

The square root of 315123 is about 561.3581744306. The cubic root of 315123 is about 68.0497761270.

Adding to 315123 its reverse (321513), we get a palindrome (636636).

It can be divided in two parts, 3 and 15123, that multiplied together give a square (45369 = 213²).

The spelling of 315123 in words is "three hundred fifteen thousand, one hundred twenty-three".