1317409 has 2 divisors, whose sum is σ = 1317410. Its totient is φ = 1317408.

The previous prime is 1317401. The next prime is 1317413. The reversal of 1317409 is 9047131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1134225 + 183184 = 1065^2 + 428^2 .

It is a cyclic number.

It is not a de Polignac number, because 1317409 - 2³ = 1317401 is a prime.

1317409 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1317401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 658704 + 658705.

It is an arithmetic number, because the mean of its divisors is an integer number (658705).

2^1317409 is an apocalyptic number.

It is an amenable number.

1317409 is a deficient number, since it is larger than the sum of its proper divisors (1).

1317409 is an equidigital number, since it uses as much as digits as its factorization.

1317409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 1317409 is about 1147.7843874178. The cubic root of 1317409 is about 109.6243106336.

The spelling of 1317409 in words is "one million, three hundred seventeen thousand, four hundred nine".