12305689 has 16 divisors (see below), whose sum is σ = 13904640. Its totient is φ = 10794960.

The previous prime is 12305687. The next prime is 12305693. The reversal of 12305689 is 98650321.

12305689 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 12305689 - 2¹ = 12305687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12305687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43342 + ... + 43624.

It is an arithmetic number, because the mean of its divisors is an integer number (869040).

Almost surely, 2^12305689 is an apocalyptic number.

It is an amenable number.

12305689 is a deficient number, since it is larger than the sum of its proper divisors (1598951).

12305689 is a wasteful number, since it uses less digits than its factorization.

12305689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 12305689 is about 3507.9465503340. The cubic root of 12305689 is about 230.8706071201.

The spelling of 12305689 in words is "twelve million, three hundred five thousand, six hundred eighty-nine".