6622401 has 16 divisors (see below), whose sum is σ = 9460800. Its totient is φ = 4105728.

The previous prime is 6622391. The next prime is 6622423. The reversal of 6622401 is 1042266.

It is a happy number.

It is not a de Polignac number, because 6622401 - 2¹¹ = 6620353 is a prime.

It is an Ulam number.

6622401 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6622501) 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, 3810 + ... + 5268.

It is an arithmetic number, because the mean of its divisors is an integer number (591300).

Almost surely, 2^6622401 is an apocalyptic number.

It is an amenable number.

6622401 is a deficient number, since it is larger than the sum of its proper divisors (2838399).

6622401 is a wasteful number, since it uses less digits than its factorization.

6622401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1568.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 6622401 is about 2573.4026113300. The cubic root of 6622401 is about 187.7897245322.

Adding to 6622401 its reverse (1042266), we get a palindrome (7664667).

The spelling of 6622401 in words is "six million, six hundred twenty-two thousand, four hundred one".