12320289 has 16 divisors (see below), whose sum is σ = 18352000. Its totient is φ = 8168688.

The previous prime is 12320267. The next prime is 12320309. The reversal of 12320289 is 98202321.

It is a happy number.

12320289 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12320289 - 2⁹ = 12319777 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12320219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4227 + ... + 6519.

It is an arithmetic number, because the mean of its divisors is an integer number (1147000).

Almost surely, 2^12320289 is an apocalyptic number.

It is an amenable number.

12320289 is a deficient number, since it is larger than the sum of its proper divisors (6031711).

12320289 is a wasteful number, since it uses less digits than its factorization.

12320289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2501 (or 2495 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 12320289 is about 3510.0269229737. The cubic root of 12320289 is about 230.9618759820.

The spelling of 12320289 in words is "twelve million, three hundred twenty thousand, two hundred eighty-nine".