810464257 has 2 divisors, whose sum is σ = 810464258. Its totient is φ = 810464256.

The previous prime is 810464251. The next prime is 810464311. The reversal of 810464257 is 752464018.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 615833856 + 194630401 = 24816^2 + 13951^2 .

It is a cyclic number.

It is not a de Polignac number, because 810464257 - 2¹⁹ = 809939969 is a prime.

It is not a weakly prime, because it can be changed into another prime (810464251) 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, 405232128 + 405232129.

It is an arithmetic number, because the mean of its divisors is an integer number (405232129).

Almost surely, 2^810464257 is an apocalyptic number.

It is an amenable number.

810464257 is a deficient number, since it is larger than the sum of its proper divisors (1).

810464257 is an equidigital number, since it uses as much as digits as its factorization.

810464257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 53760, while the sum is 37.

The square root of 810464257 is about 28468.6539372693. The cubic root of 810464257 is about 932.3478109128.

It can be divided in two parts, 8104 and 64257, that added together give a square (72361 = 269²).

The spelling of 810464257 in words is "eight hundred ten million, four hundred sixty-four thousand, two hundred fifty-seven".