822642 has 16 divisors (see below), whose sum is σ = 1657152. Its totient is φ = 272240.

The previous prime is 822631. The next prime is 822667. The reversal of 822642 is 246228.

822642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 822642.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 592 + ... + 1412.

It is an arithmetic number, because the mean of its divisors is an integer number (103572).

2⁸²²⁶⁴² is an apocalyptic number.

822642 is an abundant number, since it is smaller than the sum of its proper divisors (834510).

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

822642 is a wasteful number, since it uses less digits than its factorization.

822642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 993.

The product of its digits is 1536, while the sum is 24.

The square root of 822642 is about 906.9961411164. The cubic root of 822642 is about 93.6994322848.

The spelling of 822642 in words is "eight hundred twenty-two thousand, six hundred forty-two".