6721072 has 20 divisors (see below), whose sum is σ = 13326280. Its totient is φ = 3282048.

The previous prime is 6721061. The next prime is 6721093. The reversal of 6721072 is 2701276.

It is an Ulam number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4197 + ... + 5572.

It is an arithmetic number, because the mean of its divisors is an integer number (666314).

Almost surely, 2^6721072 is an apocalyptic number.

It is an amenable number.

6721072 is a deficient number, since it is larger than the sum of its proper divisors (6605208).

6721072 is a wasteful number, since it uses less digits than its factorization.

6721072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9820 (or 9814 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 6721072 is about 2592.5030376067. The cubic root of 6721072 is about 188.7177931393.

The spelling of 6721072 in words is "six million, seven hundred twenty-one thousand, seventy-two".