812845252 has 12 divisors (see below), whose sum is σ = 1445798956. Its totient is φ = 399759840.

The previous prime is 812845219. The next prime is 812845283. The reversal of 812845252 is 252548218.

It can be written as a sum of positive squares in 2 ways, for example, as 20647936 + 792197316 = 4544^2 + 28146^2 .

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, 1665423 + ... + 1665910.

Almost surely, 2^812845252 is an apocalyptic number.

It is an amenable number.

812845252 is a deficient number, since it is larger than the sum of its proper divisors (632953704).

812845252 is a wasteful number, since it uses less digits than its factorization.

812845252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3331398 (or 3331396 counting only the distinct ones).

The product of its digits is 51200, while the sum is 37.

The square root of 812845252 is about 28510.4411049706. The cubic root of 812845252 is about 933.2599404307.

The spelling of 812845252 in words is "eight hundred twelve million, eight hundred forty-five thousand, two hundred fifty-two".