6543872 has 20 divisors (see below), whose sum is σ = 13075986. Its totient is φ = 3271680.

The previous prime is 6543871. The next prime is 6543877. The reversal of 6543872 is 2783456.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 4946176 + 1597696 = 2224^2 + 1264^2 .

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

It is not an unprimeable number, because it can be changed into a prime (6543871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5879 + ... + 6902.

Almost surely, 2^6543872 is an apocalyptic number.

It is an amenable number.

6543872 is a deficient number, since it is larger than the sum of its proper divisors (6532114).

6543872 is an equidigital number, since it uses as much as digits as its factorization.

6543872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12799 (or 12783 counting only the distinct ones).

The product of its digits is 40320, while the sum is 35.

The square root of 6543872 is about 2558.0992943981. The cubic root of 6543872 is about 187.0444954981.

The spelling of 6543872 in words is "six million, five hundred forty-three thousand, eight hundred seventy-two".