816122 has 8 divisors (see below), whose sum is σ = 1228500. Its totient is φ = 406624.

The previous prime is 816121. The next prime is 816131. The reversal of 816122 is 221618.

It can be written as a sum of positive squares in 2 ways, for example, as 808201 + 7921 = 899^2 + 89^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 816094 and 816103.

It is not an unprimeable number, because it can be changed into a prime (816121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 254 + ... + 1302.

2⁸¹⁶¹²² is an apocalyptic number.

816122 is a deficient number, since it is larger than the sum of its proper divisors (412378).

816122 is a wasteful number, since it uses less digits than its factorization.

816122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1440.

The product of its digits is 192, while the sum is 20.

The square root of 816122 is about 903.3947088621. The cubic root of 816122 is about 93.4512313947.

The spelling of 816122 in words is "eight hundred sixteen thousand, one hundred twenty-two".