12328561 has 8 divisors (see below), whose sum is σ = 14140224. Its totient is φ = 10529520.

The previous prime is 12328559. The next prime is 12328583. The reversal of 12328561 is 16582321.

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

It is a cyclic number.

It is not a de Polignac number, because 12328561 - 2¹ = 12328559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12328531) 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 7 ways as a sum of consecutive naturals, for example, 955 + ... + 5056.

It is an arithmetic number, because the mean of its divisors is an integer number (1767528).

Almost surely, 2^12328561 is an apocalyptic number.

It is an amenable number.

12328561 is a deficient number, since it is larger than the sum of its proper divisors (1811663).

12328561 is an equidigital number, since it uses as much as digits as its factorization.

12328561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6311.

The product of its digits is 2880, while the sum is 28.

The square root of 12328561 is about 3511.2050637922. The cubic root of 12328561 is about 231.0135546727.

The spelling of 12328561 in words is "twelve million, three hundred twenty-eight thousand, five hundred sixty-one".