1247291 has 2 divisors, whose sum is σ = 1247292. Its totient is φ = 1247290.

The previous prime is 1247269. The next prime is 1247297. The reversal of 1247291 is 1927421.

It is a strong prime.

It is an emirp because it is prime and its reverse (1927421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1247291 - 2¹⁴ = 1230907 is a prime.

It is a Chen prime.

It is equal to p₉₆₂₆₃ and since 1247291 and 96263 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1247291.

It is not a weakly prime, because it can be changed into another prime (1247297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 623645 + 623646.

It is an arithmetic number, because the mean of its divisors is an integer number (623646).

2^1247291 is an apocalyptic number.

1247291 is a deficient number, since it is larger than the sum of its proper divisors (1).

1247291 is an equidigital number, since it uses as much as digits as its factorization.

1247291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1008, while the sum is 26.

The square root of 1247291 is about 1116.8218300159. The cubic root of 1247291 is about 107.6438600370.

The spelling of 1247291 in words is "one million, two hundred forty-seven thousand, two hundred ninety-one".