812972 has 18 divisors (see below), whose sum is σ = 1504188. Its totient is φ = 384408.

The previous prime is 812969. The next prime is 813013. The reversal of 812972 is 279218.

It is a happy number.

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 5 ways as a sum of consecutive naturals, for example, 1163 + ... + 1725.

It is an arithmetic number, because the mean of its divisors is an integer number (83566).

2⁸¹²⁹⁷² is an apocalyptic number.

It is an amenable number.

812972 is a deficient number, since it is larger than the sum of its proper divisors (691216).

812972 is a wasteful number, since it uses less digits than its factorization.

812972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605 (or 584 counting only the distinct ones).

The product of its digits is 2016, while the sum is 29.

The square root of 812972 is about 901.6495993456. The cubic root of 812972 is about 93.3308446048.

The spelling of 812972 in words is "eight hundred twelve thousand, nine hundred seventy-two".