1317257 has 2 divisors, whose sum is σ = 1317258. Its totient is φ = 1317256.

The previous prime is 1317247. The next prime is 1317259. The reversal of 1317257 is 7527131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1301881 + 15376 = 1141^2 + 124^2 .

It is a cyclic number.

It is not a de Polignac number, because 1317257 - 2⁶ = 1317193 is a prime.

Together with 1317259, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1317259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 658628 + 658629.

It is an arithmetic number, because the mean of its divisors is an integer number (658629).

2^1317257 is an apocalyptic number.

It is an amenable number.

1317257 is a deficient number, since it is larger than the sum of its proper divisors (1).

1317257 is an equidigital number, since it uses as much as digits as its factorization.

1317257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1470, while the sum is 26.

The square root of 1317257 is about 1147.7181709810. The cubic root of 1317257 is about 109.6200943940.

The spelling of 1317257 in words is "one million, three hundred seventeen thousand, two hundred fifty-seven".