12000721 has 8 divisors (see below), whose sum is σ = 12225024. Its totient is φ = 11778480.

The previous prime is 12000683. The next prime is 12000731. The reversal of 12000721 is 12700021.

12000721 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12000721 - 2¹¹ = 11998673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12000731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15475 + ... + 16231.

It is an arithmetic number, because the mean of its divisors is an integer number (1528128).

Almost surely, 2^12000721 is an apocalyptic number.

It is an amenable number.

12000721 is a deficient number, since it is larger than the sum of its proper divisors (224303).

12000721 is an equidigital number, since it uses as much as digits as its factorization.

12000721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1031.

The product of its (nonzero) digits is 28, while the sum is 13.

The square root of 12000721 is about 3464.2056809606. The cubic root of 12000721 is about 228.9474336353.

Adding to 12000721 its reverse (12700021), we get a palindrome (24700742).

It can be divided in two parts, 12000 and 721, that added together give a palindrome (12721).

The spelling of 12000721 in words is "twelve million, seven hundred twenty-one", and thus it is an aban number.