6521872 has 20 divisors (see below), whose sum is σ = 14441536. Its totient is φ = 2795040.

The previous prime is 6521843. The next prime is 6521899. The reversal of 6521872 is 2781256.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29004 + ... + 29227.

Almost surely, 2^6521872 is an apocalyptic number.

It is an amenable number.

6521872 is an abundant number, since it is smaller than the sum of its proper divisors (7919664).

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

6521872 is a wasteful number, since it uses less digits than its factorization.

6521872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58246 (or 58240 counting only the distinct ones).

The product of its digits is 6720, while the sum is 31.

The square root of 6521872 is about 2553.7956065433. The cubic root of 6521872 is about 186.8346503713.

The spelling of 6521872 in words is "six million, five hundred twenty-one thousand, eight hundred seventy-two".