12305643 has 16 divisors (see below), whose sum is σ = 18813696. Its totient is φ = 7008480.

The previous prime is 12305641. The next prime is 12305653. The reversal of 12305643 is 34650321.

It is a happy number.

It is not a de Polignac number, because 12305643 - 2¹ = 12305641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12305641) 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, 7048 + ... + 8618.

It is an arithmetic number, because the mean of its divisors is an integer number (1175856).

Almost surely, 2^12305643 is an apocalyptic number.

12305643 is a deficient number, since it is larger than the sum of its proper divisors (6508053).

12305643 is a wasteful number, since it uses less digits than its factorization.

12305643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1954.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 12305643 is about 3507.9399937855. The cubic root of 12305643 is about 230.8703194466.

Adding to 12305643 its reverse (34650321), we get a palindrome (46955964).

The spelling of 12305643 in words is "twelve million, three hundred five thousand, six hundred forty-three".