12659321 has 4 divisors (see below), whose sum is σ = 12729444. Its totient is φ = 12589200.

The previous prime is 12659303. The next prime is 12659323. The reversal of 12659321 is 12395621.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 583696 + 12075625 = 764^2 + 3475^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12659321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12659323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34790 + ... + 35151.

It is an arithmetic number, because the mean of its divisors is an integer number (3182361).

Almost surely, 2^12659321 is an apocalyptic number.

It is an amenable number.

12659321 is a deficient number, since it is larger than the sum of its proper divisors (70123).

12659321 is an equidigital number, since it uses as much as digits as its factorization.

12659321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70122.

The product of its digits is 3240, while the sum is 29.

The square root of 12659321 is about 3557.9939572742. The cubic root of 12659321 is about 233.0612854316.

The spelling of 12659321 in words is "twelve million, six hundred fifty-nine thousand, three hundred twenty-one".