812423 has 4 divisors (see below), whose sum is σ = 814248. Its totient is φ = 810600.

The previous prime is 812401. The next prime is 812431. The reversal of 812423 is 324218.

812423 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 324218 = 2 ⋅162109.

It is a cyclic number.

It is not a de Polignac number, because 812423 - 2⁶ = 812359 is a prime.

It is a super-2 number, since 2×812423² = 1320062261858, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 812395 and 812404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812443) 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, 248 + ... + 1298.

It is an arithmetic number, because the mean of its divisors is an integer number (203562).

2⁸¹²⁴²³ is an apocalyptic number.

812423 is a deficient number, since it is larger than the sum of its proper divisors (1825).

812423 is a wasteful number, since it uses less digits than its factorization.

812423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1824.

The product of its digits is 384, while the sum is 20.

The square root of 812423 is about 901.3451059389. The cubic root of 812423 is about 93.3098311005.

The spelling of 812423 in words is "eight hundred twelve thousand, four hundred twenty-three".