315257 has 2 divisors, whose sum is σ = 315258. Its totient is φ = 315256.

The previous prime is 315251. The next prime is 315269. The reversal of 315257 is 752513.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 295936 + 19321 = 544^2 + 139^2 .

It is an emirp because it is prime and its reverse (752513) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 315257 - 2⁶ = 315193 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 315257.

It is not a weakly prime, because it can be changed into another prime (315251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157628 + 157629.

It is an arithmetic number, because the mean of its divisors is an integer number (157629).

2³¹⁵²⁵⁷ is an apocalyptic number.

It is an amenable number.

315257 is a deficient number, since it is larger than the sum of its proper divisors (1).

315257 is an equidigital number, since it uses as much as digits as its factorization.

315257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1050, while the sum is 23.

The square root of 315257 is about 561.4775151331. The cubic root of 315257 is about 68.0594203800.

The spelling of 315257 in words is "three hundred fifteen thousand, two hundred fifty-seven".