811297 has 2 divisors, whose sum is σ = 811298. Its totient is φ = 811296.

The previous prime is 811289. The next prime is 811337. The reversal of 811297 is 792118.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 654481 + 156816 = 809^2 + 396^2 .

It is a cyclic number.

It is not a de Polignac number, because 811297 - 2³ = 811289 is a prime.

It is not a weakly prime, because it can be changed into another prime (811207) 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, 405648 + 405649.

It is an arithmetic number, because the mean of its divisors is an integer number (405649).

2⁸¹¹²⁹⁷ is an apocalyptic number.

It is an amenable number.

811297 is a deficient number, since it is larger than the sum of its proper divisors (1).

811297 is an equidigital number, since it uses as much as digits as its factorization.

811297 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1008, while the sum is 28.

The square root of 811297 is about 900.7202673416. The cubic root of 811297 is about 93.2667027272.

It can be divided in two parts, 81 and 1297, that added together give a triangular number (1378 = T₅₂).

The spelling of 811297 in words is "eight hundred eleven thousand, two hundred ninety-seven".