12257317 has 2 divisors, whose sum is σ = 12257318. Its totient is φ = 12257316.

The previous prime is 12257293. The next prime is 12257327. The reversal of 12257317 is 71375221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11737476 + 519841 = 3426^2 + 721^2 .

It is an emirp because it is prime and its reverse (71375221) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12257317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12257327) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6128658 + 6128659.

It is an arithmetic number, because the mean of its divisors is an integer number (6128659).

Almost surely, 2^12257317 is an apocalyptic number.

It is an amenable number.

12257317 is a deficient number, since it is larger than the sum of its proper divisors (1).

12257317 is an equidigital number, since it uses as much as digits as its factorization.

12257317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2940, while the sum is 28.

The square root of 12257317 is about 3501.0451296720. The cubic root of 12257317 is about 230.5677028314.

The spelling of 12257317 in words is "twelve million, two hundred fifty-seven thousand, three hundred seventeen".