812286281 has 2 divisors, whose sum is σ = 812286282. Its totient is φ = 812286280.

The previous prime is 812286269. The next prime is 812286287. The reversal of 812286281 is 182682218.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 809914681 + 2371600 = 28459^2 + 1540^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-812286281 is a prime.

It is a super-2 number, since 2×812286281² = 1319618004601621922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (812286287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406143140 + 406143141.

It is an arithmetic number, because the mean of its divisors is an integer number (406143141).

Almost surely, 2^812286281 is an apocalyptic number.

It is an amenable number.

812286281 is a deficient number, since it is larger than the sum of its proper divisors (1).

812286281 is an equidigital number, since it uses as much as digits as its factorization.

812286281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24576, while the sum is 38.

The square root of 812286281 is about 28500.6365016643. The cubic root of 812286281 is about 933.0459657679.

The spelling of 812286281 in words is "eight hundred twelve million, two hundred eighty-six thousand, two hundred eighty-one".