315246121 has 2 divisors, whose sum is σ = 315246122. Its totient is φ = 315246120.

The previous prime is 315246077. The next prime is 315246137. The reversal of 315246121 is 121642513.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 288320400 + 26925721 = 16980^2 + 5189^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-315246121 is a prime.

It is not a weakly prime, because it can be changed into another prime (315246821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157623060 + 157623061.

It is an arithmetic number, because the mean of its divisors is an integer number (157623061).

Almost surely, 2^315246121 is an apocalyptic number.

It is an amenable number.

315246121 is a deficient number, since it is larger than the sum of its proper divisors (1).

315246121 is an equidigital number, since it uses as much as digits as its factorization.

315246121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1440, while the sum is 25.

The square root of 315246121 is about 17755.1716691222. The cubic root of 315246121 is about 680.5863749811.

Adding to 315246121 its reverse (121642513), we get a palindrome (436888634).

The spelling of 315246121 in words is "three hundred fifteen million, two hundred forty-six thousand, one hundred twenty-one".