812443 has 2 divisors, whose sum is σ = 812444. Its totient is φ = 812442.

The previous prime is 812431. The next prime is 812467. The reversal of 812443 is 344218.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 812443 - 2⁹ = 811931 is a prime.

It is not a weakly prime, because it can be changed into another prime (812473) 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, 406221 + 406222.

It is an arithmetic number, because the mean of its divisors is an integer number (406222).

2⁸¹²⁴⁴³ is an apocalyptic number.

812443 is a deficient number, since it is larger than the sum of its proper divisors (1).

812443 is an equidigital number, since it uses as much as digits as its factorization.

812443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 768, while the sum is 22.

The square root of 812443 is about 901.3562004003. The cubic root of 812443 is about 93.3105967860.

The spelling of 812443 in words is "eight hundred twelve thousand, four hundred forty-three".