812431 has 2 divisors, whose sum is σ = 812432. Its totient is φ = 812430.

The previous prime is 812401. The next prime is 812443. The reversal of 812431 is 134218.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 812431 - 2⁹ = 811919 is a prime.

It is a super-2 number, since 2×812431² = 1320088259522, which contains 22 as substring.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 812399 and 812408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (812401) 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, 406215 + 406216.

It is an arithmetic number, because the mean of its divisors is an integer number (406216).

2⁸¹²⁴³¹ is an apocalyptic number.

812431 is a deficient number, since it is larger than the sum of its proper divisors (1).

812431 is an equidigital number, since it uses as much as digits as its factorization.

812431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 192, while the sum is 19.

The square root of 812431 is about 901.3495437398. The cubic root of 812431 is about 93.3101373762.

Adding to 812431 its reverse (134218), we get a palindrome (946649).

The spelling of 812431 in words is "eight hundred twelve thousand, four hundred thirty-one".