812839042 has 8 divisors (see below), whose sum is σ = 1237456656. Its totient is φ = 400353492.

The previous prime is 812839039. The next prime is 812839073. The reversal of 812839042 is 240938218.

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

It is a junction number, because it is equal to n+sod(n) for n = 812838992 and 812839010.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3032848 + ... + 3033115.

It is an arithmetic number, because the mean of its divisors is an integer number (154682082).

Almost surely, 2^812839042 is an apocalyptic number.

812839042 is a deficient number, since it is larger than the sum of its proper divisors (424617614).

812839042 is a wasteful number, since it uses less digits than its factorization.

812839042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6066032.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 812839042 is about 28510.3321972930. The cubic root of 812839042 is about 933.2575637754.

The spelling of 812839042 in words is "eight hundred twelve million, eight hundred thirty-nine thousand, forty-two".