12340321 has 4 divisors (see below), whose sum is σ = 14103232. Its totient is φ = 10577412.

The previous prime is 12340313. The next prime is 12340343. The reversal of 12340321 is 12304321.

It is a happy number.

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 12340321 - 2³ = 12340313 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12340295 and 12340304.

It is not an unprimeable number, because it can be changed into a prime (12340421) 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, 881445 + ... + 881458.

It is an arithmetic number, because the mean of its divisors is an integer number (3525808).

Almost surely, 2^12340321 is an apocalyptic number.

It is an amenable number.

12340321 is a deficient number, since it is larger than the sum of its proper divisors (1762911).

12340321 is an equidigital number, since it uses as much as digits as its factorization.

12340321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1762910.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 12340321 is about 3512.8793033636. The cubic root of 12340321 is about 231.0869846010.

Adding to 12340321 its reverse (12304321), we get a palindrome (24644642).

The spelling of 12340321 in words is "twelve million, three hundred forty thousand, three hundred twenty-one".