6726321 has 20 divisors (see below), whose sum is σ = 11484352. Its totient is φ = 3843288.

The previous prime is 6726299. The next prime is 6726329. The reversal of 6726321 is 1236276.

It is a happy number.

It is not a de Polignac number, because 6726321 - 2⁶ = 6726257 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6726329) 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 19 ways as a sum of consecutive naturals, for example, 5365 + ... + 6498.

Almost surely, 2^6726321 is an apocalyptic number.

It is an amenable number.

6726321 is a deficient number, since it is larger than the sum of its proper divisors (4758031).

6726321 is a wasteful number, since it uses less digits than its factorization.

6726321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11882 (or 11873 counting only the distinct ones).

The product of its digits is 3024, while the sum is 27.

The square root of 6726321 is about 2593.5151821418. The cubic root of 6726321 is about 188.7669084161.

The spelling of 6726321 in words is "six million, seven hundred twenty-six thousand, three hundred twenty-one".