6722401 has 16 divisors (see below), whose sum is σ = 8023680. Its totient is φ = 5512320.

The previous prime is 6722399. The next prime is 6722411. The reversal of 6722401 is 1042276.

It is a cyclic number.

It is not a de Polignac number, because 6722401 - 2¹ = 6722399 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6722411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16735 + ... + 17131.

It is an arithmetic number, because the mean of its divisors is an integer number (501480).

Almost surely, 2^6722401 is an apocalyptic number.

It is an amenable number.

6722401 is a deficient number, since it is larger than the sum of its proper divisors (1301279).

6722401 is a wasteful number, since it uses less digits than its factorization.

6722401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 6722401 is about 2592.7593409339. The cubic root of 6722401 is about 188.7302311065.

Adding to 6722401 its reverse (1042276), we get a palindrome (7764677).

The spelling of 6722401 in words is "six million, seven hundred twenty-two thousand, four hundred one".