820122 has 16 divisors (see below), whose sum is σ = 1671840. Its totient is φ = 268112.

The previous prime is 820117. The next prime is 820129. The reversal of 820122 is 221028.

It is not an unprimeable number, because it can be changed into a prime (820129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 972 + ... + 1607.

It is an arithmetic number, because the mean of its divisors is an integer number (104490).

2⁸²⁰¹²² is an apocalyptic number.

820122 is an abundant number, since it is smaller than the sum of its proper divisors (851718).

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

820122 is a wasteful number, since it uses less digits than its factorization.

820122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2637.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 820122 is about 905.6058745393. The cubic root of 820122 is about 93.6036579037.

The spelling of 820122 in words is "eight hundred twenty thousand, one hundred twenty-two".