811442 has 8 divisors (see below), whose sum is σ = 1221276. Its totient is φ = 404352.

The previous prime is 811441. The next prime is 811457. The reversal of 811442 is 244118.

It can be written as a sum of positive squares in 2 ways, for example, as 625681 + 185761 = 791^2 + 431^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×811442³ = 1602853033358888664, which contains 333 as substring.

It is an Ulam number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 811442.

It is not an unprimeable number, because it can be changed into a prime (811441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 398 + ... + 1334.

2⁸¹¹⁴⁴² is an apocalyptic number.

811442 is a deficient number, since it is larger than the sum of its proper divisors (409834).

811442 is a wasteful number, since it uses less digits than its factorization.

811442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1372.

The product of its digits is 256, while the sum is 20.

The square root of 811442 is about 900.8007548842. The cubic root of 811442 is about 93.2722587962.

The spelling of 811442 in words is "eight hundred eleven thousand, four hundred forty-two".