12305661 has 8 divisors (see below), whose sum is σ = 16456224. Its totient is φ = 8179440.

The previous prime is 12305659. The next prime is 12305669. The reversal of 12305661 is 16650321.

12305661 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 12305661 - 2¹ = 12305659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12305669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4870 + ... + 6951.

It is an arithmetic number, because the mean of its divisors is an integer number (2057028).

Almost surely, 2^12305661 is an apocalyptic number.

It is an amenable number.

12305661 is a deficient number, since it is larger than the sum of its proper divisors (4150563).

12305661 is a wasteful number, since it uses less digits than its factorization.

12305661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12171.

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

The square root of 12305661 is about 3507.9425593929. The cubic root of 12305661 is about 230.8704320146.

Adding to 12305661 its reverse (16650321), we get a palindrome (28955982).

The spelling of 12305661 in words is "twelve million, three hundred five thousand, six hundred sixty-one".