12320321 has 8 divisors (see below), whose sum is σ = 13493760. Its totient is φ = 11179152.

The previous prime is 12320309. The next prime is 12320339. The reversal of 12320321 is 12302321.

It is a happy number.

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 12320321 - 2¹⁰ = 12319297 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12320296 and 12320305.

It is not an unprimeable number, because it can be changed into a prime (12320351) 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, 7265 + ... + 8798.

It is an arithmetic number, because the mean of its divisors is an integer number (1686720).

Almost surely, 2^12320321 is an apocalyptic number.

It is an amenable number.

12320321 is a deficient number, since it is larger than the sum of its proper divisors (1173439).

12320321 is a wasteful number, since it uses less digits than its factorization.

12320321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16135.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 12320321 is about 3510.0314813403. The cubic root of 12320321 is about 230.9620759441.

Adding to 12320321 its reverse (12302321), we get a palindrome (24622642).

The spelling of 12320321 in words is "twelve million, three hundred twenty thousand, three hundred twenty-one".