812942 has 8 divisors (see below), whose sum is σ = 1313256. Its totient is φ = 375192.

The previous prime is 812939. The next prime is 812963. The reversal of 812942 is 249218.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (26), and also a Moran number because the ratio is a prime number: 31267 = 812942 / (8 + 1 + 2 + 9 + 4 + 2).

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 15608 + ... + 15659.

It is an arithmetic number, because the mean of its divisors is an integer number (164157).

2⁸¹²⁹⁴² is an apocalyptic number.

812942 is a deficient number, since it is larger than the sum of its proper divisors (500314).

812942 is a wasteful number, since it uses less digits than its factorization.

812942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31282.

The product of its digits is 1152, while the sum is 26.

The square root of 812942 is about 901.6329630177. The cubic root of 812942 is about 93.3296965703.

The spelling of 812942 in words is "eight hundred twelve thousand, nine hundred forty-two".