1317191 has 2 divisors, whose sum is σ = 1317192. Its totient is φ = 1317190.

The previous prime is 1317161. The next prime is 1317193. The reversal of 1317191 is 1917131.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1317191 is a prime.

Together with 1317193, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1317193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 658595 + 658596.

It is an arithmetic number, because the mean of its divisors is an integer number (658596).

2^1317191 is an apocalyptic number.

1317191 is a deficient number, since it is larger than the sum of its proper divisors (1).

1317191 is an equidigital number, since it uses as much as digits as its factorization.

1317191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 189, while the sum is 23.

The square root of 1317191 is about 1147.6894179176. The cubic root of 1317191 is about 109.6182635574.

The spelling of 1317191 in words is "one million, three hundred seventeen thousand, one hundred ninety-one".