812243 has 4 divisors (see below), whose sum is σ = 860040. Its totient is φ = 764448.

The previous prime is 812233. The next prime is 812249. The reversal of 812243 is 342218.

812243 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.

It is a cyclic number.

It is not a de Polignac number, because 812243 - 2⁶ = 812179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (812249) 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, 23873 + ... + 23906.

It is an arithmetic number, because the mean of its divisors is an integer number (215010).

2⁸¹²²⁴³ is an apocalyptic number.

812243 is a deficient number, since it is larger than the sum of its proper divisors (47797).

812243 is a wasteful number, since it uses less digits than its factorization.

812243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47796.

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

The square root of 812243 is about 901.2452496407. The cubic root of 812243 is about 93.3029393663.

The spelling of 812243 in words is "eight hundred twelve thousand, two hundred forty-three".