315403121 has 4 divisors (see below), whose sum is σ = 344076144. Its totient is φ = 286730100.

The previous prime is 315403069. The next prime is 315403129. The reversal of 315403121 is 121304513.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 121304513 = 11 ⋅11027683.

It is a cyclic number.

It is not a de Polignac number, because 315403121 - 2²⁶ = 248294257 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 315403093 and 315403102.

It is not an unprimeable number, because it can be changed into a prime (315403129) 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, 14336495 + ... + 14336516.

It is an arithmetic number, because the mean of its divisors is an integer number (86019036).

Almost surely, 2^315403121 is an apocalyptic number.

It is an amenable number.

315403121 is a deficient number, since it is larger than the sum of its proper divisors (28673023).

315403121 is a wasteful number, since it uses less digits than its factorization.

315403121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28673022.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 315403121 is about 17759.5923658174. The cubic root of 315403121 is about 680.6993389166.

Adding to 315403121 its reverse (121304513), we get a palindrome (436707634).

The spelling of 315403121 in words is "three hundred fifteen million, four hundred three thousand, one hundred twenty-one".