12133661 has 8 divisors (see below), whose sum is σ = 12628224. Its totient is φ = 11649040.

The previous prime is 12133651. The next prime is 12133691. The reversal of 12133661 is 16633121.

It is a happy number.

12133661 is digitally balanced in base 2, 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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12133661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12133621) 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, 56 + ... + 4926.

It is an arithmetic number, because the mean of its divisors is an integer number (1578528).

Almost surely, 2^12133661 is an apocalyptic number.

It is an amenable number.

12133661 is a deficient number, since it is larger than the sum of its proper divisors (494563).

12133661 is an equidigital number, since it uses as much as digits as its factorization.

12133661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4971.

The product of its digits is 648, while the sum is 23.

The square root of 12133661 is about 3483.3404944105. The cubic root of 12133661 is about 229.7897322158.

Adding to 12133661 its reverse (16633121), we get a palindrome (28766782).

The spelling of 12133661 in words is "twelve million, one hundred thirty-three thousand, six hundred sixty-one".