812222 has 8 divisors (see below), whose sum is σ = 1271376. Its totient is φ = 388432.

The previous prime is 812221. The next prime is 812233. The reversal of 812222 is 222218.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 812222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812221) by changing a digit.

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, 8783 + ... + 8874.

It is an arithmetic number, because the mean of its divisors is an integer number (158922).

2⁸¹²²²² is an apocalyptic number.

812222 is a deficient number, since it is larger than the sum of its proper divisors (459154).

812222 is a wasteful number, since it uses less digits than its factorization.

812222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17682.

The product of its digits is 128, while the sum is 17.

The square root of 812222 is about 901.2335990186. The cubic root of 812222 is about 93.3021352643.

The spelling of 812222 in words is "eight hundred twelve thousand, two hundred twenty-two".