812867252 has 12 divisors (see below), whose sum is σ = 1423718436. Its totient is φ = 406090560.

The previous prime is 812867243. The next prime is 812867281. The reversal of 812867252 is 252768218.

It can be written as a sum of positive squares in 2 ways, for example, as 265494436 + 547372816 = 16294^2 + 23396^2 .

It is a congruent number.

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, 80399 + ... + 89942.

It is an arithmetic number, because the mean of its divisors is an integer number (118643203).

Almost surely, 2^812867252 is an apocalyptic number.

It is an amenable number.

812867252 is a deficient number, since it is larger than the sum of its proper divisors (610851184).

812867252 is a wasteful number, since it uses less digits than its factorization.

812867252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171538 (or 171536 counting only the distinct ones).

The product of its digits is 107520, while the sum is 41.

The square root of 812867252 is about 28510.8269259241. The cubic root of 812867252 is about 933.2683600462.

The spelling of 812867252 in words is "eight hundred twelve million, eight hundred sixty-seven thousand, two hundred fifty-two".