12306561 has 8 divisors (see below), whose sum is σ = 16425024. Its totient is φ = 8196240.

The previous prime is 12306551. The next prime is 12306563. The reversal of 12306561 is 16560321.

12306561 is nontrivially palindromic in base 14.

12306561 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12306561 - 2¹⁴ = 12290177 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12306563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4431 + ... + 6651.

It is an arithmetic number, because the mean of its divisors is an integer number (2053128).

Almost surely, 2^12306561 is an apocalyptic number.

It is an amenable number.

12306561 is a deficient number, since it is larger than the sum of its proper divisors (4118463).

12306561 is a wasteful number, since it uses less digits than its factorization.

12306561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4071.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 12306561 is about 3508.0708373692. The cubic root of 12306561 is about 230.8760602731.

Adding to 12306561 its reverse (16560321), we get a palindrome (28866882).

The spelling of 12306561 in words is "twelve million, three hundred six thousand, five hundred sixty-one".