812021034 has 16 divisors (see below), whose sum is σ = 1771682400. Its totient is φ = 246066960.

The previous prime is 812021017. The next prime is 812021053. The reversal of 812021034 is 430120218.

It is a self number, because there is not a number n which added to its sum of digits gives 812021034.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6151609 + ... + 6151740.

It is an arithmetic number, because the mean of its divisors is an integer number (110730150).

Almost surely, 2^812021034 is an apocalyptic number.

812021034 is an abundant number, since it is smaller than the sum of its proper divisors (959661366).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

812021034 is a wasteful number, since it uses less digits than its factorization.

812021034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12303365.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 812021034 is about 28495.9827695063. The cubic root of 812021034 is about 932.9443946049.

The spelling of 812021034 in words is "eight hundred twelve million, twenty-one thousand, thirty-four".