12320345 has 16 divisors (see below), whose sum is σ = 15275520. Its totient is φ = 9534144.

The previous prime is 12320339. The next prime is 12320351. The reversal of 12320345 is 54302321.

It is a happy number.

12320345 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12320339) and next prime (12320351).

It is a cyclic number.

It is not a de Polignac number, because 12320345 - 2⁸ = 12320089 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23951 + ... + 24459.

It is an arithmetic number, because the mean of its divisors is an integer number (954720).

Almost surely, 2^12320345 is an apocalyptic number.

It is an amenable number.

12320345 is a deficient number, since it is larger than the sum of its proper divisors (2955175).

12320345 is a wasteful number, since it uses less digits than its factorization.

12320345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 12320345 is about 3510.0349001114. The cubic root of 12320345 is about 230.9622259155.

Adding to 12320345 its reverse (54302321), we get a palindrome (66622666).

The spelling of 12320345 in words is "twelve million, three hundred twenty thousand, three hundred forty-five".