1273291 has 2 divisors, whose sum is σ = 1273292. Its totient is φ = 1273290.

The previous prime is 1273289. The next prime is 1273301. The reversal of 1273291 is 1923721.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1273291 - 2¹ = 1273289 is a prime.

Together with 1273289, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1273231) by changing a digit.

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

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 636645 + 636646.

It is an arithmetic number, because the mean of its divisors is an integer number (636646).

2^1273291 is an apocalyptic number.

1273291 is a deficient number, since it is larger than the sum of its proper divisors (1).

1273291 is an equidigital number, since it uses as much as digits as its factorization.

1273291 is an odious number, because the sum of its binary digits is odd.

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

The square root of 1273291 is about 1128.4019673857. The cubic root of 1273291 is about 108.3866740607.

The spelling of 1273291 in words is "one million, two hundred seventy-three thousand, two hundred ninety-one".