811422 has 24 divisors (see below), whose sum is σ = 1789320. Its totient is φ = 265680.

The previous prime is 811411. The next prime is 811429. The reversal of 811422 is 224118.

811422 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 811395 and 811404.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 811422.

It is not an unprimeable number, because it can be changed into a prime (811429) by changing a digit.

811422 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 11 ways as a sum of consecutive naturals, for example, 729 + ... + 1467.

It is an arithmetic number, because the mean of its divisors is an integer number (74555).

2⁸¹¹⁴²² is an apocalyptic number.

811422 is an abundant number, since it is smaller than the sum of its proper divisors (977898).

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

811422 is a wasteful number, since it uses less digits than its factorization.

811422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 808 (or 805 counting only the distinct ones).

The product of its digits is 128, while the sum is 18.

The square root of 811422 is about 900.7896535818. The cubic root of 811422 is about 93.2714924812.

The spelling of 811422 in words is "eight hundred eleven thousand, four hundred twenty-two".