6721232 has 30 divisors (see below), whose sum is σ = 15150258. Its totient is φ = 2880192.

The previous prime is 6721219. The next prime is 6721237. The reversal of 6721232 is 2321276.

6721232 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 5271616 + 1449616 = 2296^2 + 1204^2 .

It is an alternating number because its digits alternate between even and odd.

6721232 is a modest number, since divided by 1232 gives 672 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 6721198 and 6721207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6721237) 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 5 ways as a sum of consecutive naturals, for example, 3503 + ... + 5070.

Almost surely, 2^6721232 is an apocalyptic number.

It is an amenable number.

6721232 is an abundant number, since it is smaller than the sum of its proper divisors (8429026).

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

6721232 is a wasteful number, since it uses less digits than its factorization.

6721232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8595 (or 8582 counting only the distinct ones).

The product of its digits is 1008, while the sum is 23.

The square root of 6721232 is about 2592.5338956318. The cubic root of 6721232 is about 188.7192906488.

The spelling of 6721232 in words is "six million, seven hundred twenty-one thousand, two hundred thirty-two".