812722 has 4 divisors (see below), whose sum is σ = 1219086. Its totient is φ = 406360.

The previous prime is 812717. The next prime is 812731. The reversal of 812722 is 227218.

812722 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 477481 + 335241 = 691^2 + 579^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 812693 and 812702.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203179 + ... + 203182.

2⁸¹²⁷²² is an apocalyptic number.

812722 is a deficient number, since it is larger than the sum of its proper divisors (406364).

812722 is a wasteful number, since it uses less digits than its factorization.

812722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406363.

The product of its digits is 448, while the sum is 22.

The square root of 812722 is about 901.5109538991. The cubic root of 812722 is about 93.3212767873.

The spelling of 812722 in words is "eight hundred twelve thousand, seven hundred twenty-two".