812042 has 16 divisors (see below), whose sum is σ = 1518912. Its totient is φ = 316320.

The previous prime is 812033. The next prime is 812047. The reversal of 812042 is 240218.

It is a self number, because there is not a number n which added to its sum of digits gives 812042.

It is not an unprimeable number, because it can be changed into a prime (812047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2483 + ... + 2790.

It is an arithmetic number, because the mean of its divisors is an integer number (94932).

2⁸¹²⁰⁴² is an apocalyptic number.

812042 is a deficient number, since it is larger than the sum of its proper divisors (706870).

812042 is a wasteful number, since it uses less digits than its factorization.

812042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5293.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 812042 is about 901.1337303641. The cubic root of 812042 is about 93.2952423931.

The spelling of 812042 in words is "eight hundred twelve thousand, forty-two".