315122 has 4 divisors (see below), whose sum is σ = 472686. Its totient is φ = 157560.

The previous prime is 315109. The next prime is 315127. The reversal of 315122 is 221513.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 221513 = 23 ⋅9631.

It can be written as a sum of positive squares in only one way, i.e., 271441 + 43681 = 521^2 + 209^2 .

It is a junction number, because it is equal to n+sod(n) for n = 315097 and 315106.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 315122.

It is not an unprimeable number, because it can be changed into a prime (315127) 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 as a sum of consecutive naturals, namely, 78779 + ... + 78782.

2³¹⁵¹²² is an apocalyptic number.

315122 is a deficient number, since it is larger than the sum of its proper divisors (157564).

315122 is a wasteful number, since it uses less digits than its factorization.

315122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157563.

The product of its digits is 60, while the sum is 14.

The square root of 315122 is about 561.3572837329. The cubic root of 315122 is about 68.0497041447.

Adding to 315122 its reverse (221513), we get a palindrome (536635).

The spelling of 315122 in words is "three hundred fifteen thousand, one hundred twenty-two".