315021 has 12 divisors (see below), whose sum is σ = 488832. Its totient is φ = 179928.

The previous prime is 315013. The next prime is 315037. The reversal of 315021 is 120513.

It is not a de Polignac number, because 315021 - 2³ = 315013 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 314988 and 315006.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 315021.

It is not an unprimeable number, because it can be changed into a prime (315011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 925 + ... + 1218.

It is an arithmetic number, because the mean of its divisors is an integer number (40736).

2³¹⁵⁰²¹ is an apocalyptic number.

It is an amenable number.

315021 is a deficient number, since it is larger than the sum of its proper divisors (173811).

315021 is a wasteful number, since it uses less digits than its factorization.

315021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2160 (or 2153 counting only the distinct ones).

The product of its (nonzero) digits is 30, while the sum is 12.

The square root of 315021 is about 561.2673159912. The cubic root of 315021 is about 68.0424331464.

Adding to 315021 its reverse (120513), we get a palindrome (435534).

The spelling of 315021 in words is "three hundred fifteen thousand, twenty-one".