12356321 has 4 divisors (see below), whose sum is σ = 12754944. Its totient is φ = 11957700.

The previous prime is 12356317. The next prime is 12356329. The reversal of 12356321 is 12365321.

12356321 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 a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12356321 - 2² = 12356317 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12356329) 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, 199265 + ... + 199326.

It is an arithmetic number, because the mean of its divisors is an integer number (3188736).

Almost surely, 2^12356321 is an apocalyptic number.

It is an amenable number.

12356321 is a deficient number, since it is larger than the sum of its proper divisors (398623).

12356321 is an equidigital number, since it uses as much as digits as its factorization.

12356321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398622.

The product of its digits is 1080, while the sum is 23.

The square root of 12356321 is about 3515.1558998144. The cubic root of 12356321 is about 231.1868143903.

The spelling of 12356321 in words is "twelve million, three hundred fifty-six thousand, three hundred twenty-one".