812343 has 16 divisors (see below), whose sum is σ = 1253376. Its totient is φ = 458400.

The previous prime is 812341. The next prime is 812347. The reversal of 812343 is 343218.

It is a happy number.

It is not a de Polignac number, because 812343 - 2¹ = 812341 is a prime.

It is a super-2 number, since 2×812343² = 1319802299298, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an Ulam number.

It is an alternating number because its digits alternate between even and odd.

812343 is a lucky number.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812341) 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 in 15 ways as a sum of consecutive naturals, for example, 1930 + ... + 2312.

It is an arithmetic number, because the mean of its divisors is an integer number (78336).

2⁸¹²³⁴³ is an apocalyptic number.

812343 is a deficient number, since it is larger than the sum of its proper divisors (441033).

812343 is a wasteful number, since it uses less digits than its factorization.

812343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494.

The product of its digits is 576, while the sum is 21.

The square root of 812343 is about 901.3007267278. The cubic root of 812343 is about 93.3067682332.

812343 divided by its sum of digits (21) gives a palindrome (38683).

The spelling of 812343 in words is "eight hundred twelve thousand, three hundred forty-three".