12188661 has 8 divisors (see below), whose sum is σ = 16267680. Its totient is φ = 8117712.

The previous prime is 12188653. The next prime is 12188663. The reversal of 12188661 is 16688121.

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

It is not a de Polignac number, because 12188661 - 2³ = 12188653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12188663) 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, 4911 + ... + 6963.

It is an arithmetic number, because the mean of its divisors is an integer number (2033460).

Almost surely, 2^12188661 is an apocalyptic number.

It is an amenable number.

12188661 is a deficient number, since it is larger than the sum of its proper divisors (4079019).

12188661 is a wasteful number, since it uses less digits than its factorization.

12188661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4035.

The product of its digits is 4608, while the sum is 33.

The square root of 12188661 is about 3491.2262888561. The cubic root of 12188661 is about 230.1364093150.

The spelling of 12188661 in words is "twelve million, one hundred eighty-eight thousand, six hundred sixty-one".