1311259 has 2 divisors, whose sum is σ = 1311260. Its totient is φ = 1311258.

The previous prime is 1311251. The next prime is 1311263. The reversal of 1311259 is 9521131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1311259 - 2³ = 1311251 is a prime.

It is not a weakly prime, because it can be changed into another prime (1311251) 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, 655629 + 655630.

It is an arithmetic number, because the mean of its divisors is an integer number (655630).

2^1311259 is an apocalyptic number.

1311259 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311259 is an equidigital number, since it uses as much as digits as its factorization.

1311259 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 270, while the sum is 22.

The square root of 1311259 is about 1145.1021788469. The cubic root of 1311259 is about 109.4534597853.

The spelling of 1311259 in words is "one million, three hundred eleven thousand, two hundred fifty-nine".