812322 has 48 divisors (see below), whose sum is σ = 2106720. Its totient is φ = 231336.

The previous prime is 812309. The next prime is 812341. The reversal of 812322 is 223218.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nialpdrome in base 7 and base 16.

It is a zygodrome in base 7.

It is a junction number, because it is equal to n+sod(n) for n = 812295 and 812304.

It is an unprimeable number.

812322 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2493 + ... + 2799.

It is an arithmetic number, because the mean of its divisors is an integer number (43890).

2⁸¹²³²² is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 812322, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1053360).

812322 is an abundant number, since it is smaller than the sum of its proper divisors (1294398).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

812322 is a wasteful number, since it uses less digits than its factorization.

812322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332 (or 319 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 812322 is about 901.2890768227. The cubic root of 812322 is about 93.3059641973.

The spelling of 812322 in words is "eight hundred twelve thousand, three hundred twenty-two".