1251317 has 2 divisors, whose sum is σ = 1251318. Its totient is φ = 1251316.

The previous prime is 1251307. The next prime is 1251323. The reversal of 1251317 is 7131521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1062961 + 188356 = 1031^2 + 434^2 .

It is a cyclic number.

It is not a de Polignac number, because 1251317 - 2⁴ = 1251301 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1251307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 625658 + 625659.

It is an arithmetic number, because the mean of its divisors is an integer number (625659).

2^1251317 is an apocalyptic number.

It is an amenable number.

1251317 is a deficient number, since it is larger than the sum of its proper divisors (1).

1251317 is an equidigital number, since it uses as much as digits as its factorization.

1251317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 210, while the sum is 20.

The square root of 1251317 is about 1118.6228139994. The cubic root of 1251317 is about 107.7595530960.

Adding to 1251317 its reverse (7131521), we get a palindrome (8382838).

The spelling of 1251317 in words is "one million, two hundred fifty-one thousand, three hundred seventeen".