812025406 has 4 divisors (see below), whose sum is σ = 1218038112. Its totient is φ = 406012702.

The previous prime is 812025359. The next prime is 812025407. The reversal of 812025406 is 604520218.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812025407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203006350 + ... + 203006353.

It is an arithmetic number, because the mean of its divisors is an integer number (304509528).

Almost surely, 2^812025406 is an apocalyptic number.

812025406 is a deficient number, since it is larger than the sum of its proper divisors (406012706).

812025406 is a wasteful number, since it uses less digits than its factorization.

812025406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406012705.

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 812025406 is about 28496.0594819705. The cubic root of 812025406 is about 932.9460689563.

The spelling of 812025406 in words is "eight hundred twelve million, twenty-five thousand, four hundred six".