819422 has 4 divisors (see below), whose sum is σ = 1229136. Its totient is φ = 409710.

The previous prime is 819419. The next prime is 819431. The reversal of 819422 is 224918.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 224918 = 2 ⋅112459.

It is a junction number, because it is equal to n+sod(n) for n = 819391 and 819400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204854 + ... + 204857.

It is an arithmetic number, because the mean of its divisors is an integer number (307284).

2⁸¹⁹⁴²² is an apocalyptic number.

819422 is a deficient number, since it is larger than the sum of its proper divisors (409714).

819422 is a wasteful number, since it uses less digits than its factorization.

819422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409713.

The product of its digits is 1152, while the sum is 26.

The square root of 819422 is about 905.2193104436. The cubic root of 819422 is about 93.5770190982.

The spelling of 819422 in words is "eight hundred nineteen thousand, four hundred twenty-two".