6721612 has 12 divisors (see below), whose sum is σ = 12274416. Its totient is φ = 3214640.

The previous prime is 6721609. The next prime is 6721661. The reversal of 6721612 is 2161276.

It is an Ulam number.

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

It is a pancake number, because a pancake can be divided into 6721612 parts by 3666 straight cuts.

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, 36439 + ... + 36622.

It is an arithmetic number, because the mean of its divisors is an integer number (1022868).

Almost surely, 2^6721612 is an apocalyptic number.

It is an amenable number.

6721612 is a deficient number, since it is larger than the sum of its proper divisors (5552804).

6721612 is a wasteful number, since it uses less digits than its factorization.

6721612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73088 (or 73086 counting only the distinct ones).

The product of its digits is 1008, while the sum is 25.

The square root of 6721612 is about 2592.6071819695. The cubic root of 6721612 is about 188.7228471386.

Adding to 6721612 its reverse (2161276), we get a palindrome (8882888).

The spelling of 6721612 in words is "six million, seven hundred twenty-one thousand, six hundred twelve".