12330721 has 4 divisors (see below), whose sum is σ = 13279252. Its totient is φ = 11382192.

The previous prime is 12330719. The next prime is 12330733. The reversal of 12330721 is 12703321.

12330721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12703321 = 37 ⋅343333.

It can be written as a sum of positive squares in 2 ways, for example, as 1677025 + 10653696 = 1295^2 + 3264^2 .

It is a cyclic number.

It is not a de Polignac number, because 12330721 - 2¹ = 12330719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12330701) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 474246 + ... + 474271.

It is an arithmetic number, because the mean of its divisors is an integer number (3319813).

Almost surely, 2^12330721 is an apocalyptic number.

It is an amenable number.

12330721 is a deficient number, since it is larger than the sum of its proper divisors (948531).

12330721 is an equidigital number, since it uses as much as digits as its factorization.

12330721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 948530.

The product of its (nonzero) digits is 252, while the sum is 19.

The square root of 12330721 is about 3511.5126370270. The cubic root of 12330721 is about 231.0270453020.

The spelling of 12330721 in words is "twelve million, three hundred thirty thousand, seven hundred twenty-one".