1299791 has 2 divisors, whose sum is σ = 1299792. Its totient is φ = 1299790.

The previous prime is 1299763. The next prime is 1299811. The reversal of 1299791 is 1979921.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1299791 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 (1299721) by changing a digit.

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

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 649895 + 649896.

It is an arithmetic number, because the mean of its divisors is an integer number (649896).

2^1299791 is an apocalyptic number.

1299791 is a deficient number, since it is larger than the sum of its proper divisors (1).

1299791 is an equidigital number, since it uses as much as digits as its factorization.

1299791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10206, while the sum is 38.

The square root of 1299791 is about 1140.0837688521. The cubic root of 1299791 is about 109.1334392462.

The spelling of 1299791 in words is "one million, two hundred ninety-nine thousand, seven hundred ninety-one".