1247317 has 2 divisors, whose sum is σ = 1247318. Its totient is φ = 1247316.

The previous prime is 1247303. The next prime is 1247321. The reversal of 1247317 is 7137421.

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., 1234321 + 12996 = 1111^2 + 114^2 .

It is an emirp because it is prime and its reverse (7137421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1247317 - 2⁷ = 1247189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1247291 and 1247300.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1247327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 623658 + 623659.

It is an arithmetic number, because the mean of its divisors is an integer number (623659).

2^1247317 is an apocalyptic number.

It is an amenable number.

1247317 is a deficient number, since it is larger than the sum of its proper divisors (1).

1247317 is an equidigital number, since it uses as much as digits as its factorization.

1247317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1176, while the sum is 25.

The square root of 1247317 is about 1116.8334701288. The cubic root of 1247317 is about 107.6446079835.

The spelling of 1247317 in words is "one million, two hundred forty-seven thousand, three hundred seventeen".