6821022 has 32 divisors (see below), whose sum is σ = 14811552. Its totient is φ = 2081664.

The previous prime is 6821021. The next prime is 6821077. The reversal of 6821022 is 2201286.

It is a super-2 number, since 2×6821022² = 93052682248968, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6821022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6821021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11968 + ... + 12524.

It is an arithmetic number, because the mean of its divisors is an integer number (462861).

Almost surely, 2^6821022 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6821022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7405776).

6821022 is an abundant number, since it is smaller than the sum of its proper divisors (7990530).

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

6821022 is a wasteful number, since it uses less digits than its factorization.

6821022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 732.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 6821022 is about 2611.7086361231. The cubic root of 6821022 is about 189.6486767256.

The spelling of 6821022 in words is "six million, eight hundred twenty-one thousand, twenty-two".