6622321 has 8 divisors (see below), whose sum is σ = 6995520. Its totient is φ = 6256272.

The previous prime is 6622309. The next prime is 6622339. The reversal of 6622321 is 1232266.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 6622321 - 2⁷ = 6622193 is a prime.

It is a Duffinian number.

6622321 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 6622292 and 6622301.

It is not an unprimeable number, because it can be changed into a prime (6622391) 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, 175 + ... + 3643.

It is an arithmetic number, because the mean of its divisors is an integer number (874440).

Almost surely, 2^6622321 is an apocalyptic number.

It is an amenable number.

6622321 is a deficient number, since it is larger than the sum of its proper divisors (373199).

6622321 is a wasteful number, since it uses less digits than its factorization.

6622321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3575.

The product of its digits is 864, while the sum is 22.

The square root of 6622321 is about 2573.3870676601. The cubic root of 6622321 is about 187.7889683494.

Adding to 6622321 its reverse (1232266), we get a palindrome (7854587).

It can be divided in two parts, 66 and 22321, that multiplied together give a triangular number (1473186 = T₁₇₁₆).

The spelling of 6622321 in words is "six million, six hundred twenty-two thousand, three hundred twenty-one".