815422 has 16 divisors (see below), whose sum is σ = 1341360. Its totient is φ = 370048.

The previous prime is 815417. The next prime is 815431. The reversal of 815422 is 224518.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 815393 and 815402.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 573 + ... + 1399.

It is an arithmetic number, because the mean of its divisors is an integer number (83835).

2⁸¹⁵⁴²² is an apocalyptic number.

815422 is a deficient number, since it is larger than the sum of its proper divisors (525938).

815422 is a wasteful number, since it uses less digits than its factorization.

815422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 875.

The product of its digits is 640, while the sum is 22.

The square root of 815422 is about 903.0071981994. The cubic root of 815422 is about 93.4245055810.

The spelling of 815422 in words is "eight hundred fifteen thousand, four hundred twenty-two".