810281 has 2 divisors, whose sum is σ = 810282. Its totient is φ = 810280.

The previous prime is 810269. The next prime is 810307. The reversal of 810281 is 182018.

810281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 469225 + 341056 = 685^2 + 584^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-810281 is a prime.

It is a super-2 number, since 2×810281² = 1313110597922, which contains 22 as substring.

It is a Chen prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 810281.

It is not a weakly prime, because it can be changed into another prime (810581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 405140 + 405141.

It is an arithmetic number, because the mean of its divisors is an integer number (405141).

2⁸¹⁰²⁸¹ is an apocalyptic number.

It is an amenable number.

810281 is a deficient number, since it is larger than the sum of its proper divisors (1).

810281 is an equidigital number, since it uses as much as digits as its factorization.

810281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 20.

The square root of 810281 is about 900.1560975742. The cubic root of 810281 is about 93.2277533439.

Adding to 810281 its reverse (182018), we get a palindrome (992299).

The spelling of 810281 in words is "eight hundred ten thousand, two hundred eighty-one".