12131660 has 24 divisors (see below), whose sum is σ = 25719120. Its totient is φ = 4806464.

The previous prime is 12131653. The next prime is 12131677. The reversal of 12131660 is 6613121.

12131660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 695 + ... + 4974.

It is an arithmetic number, because the mean of its divisors is an integer number (1071630).

Almost surely, 2^12131660 is an apocalyptic number.

12131660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12131660 is an abundant number, since it is smaller than the sum of its proper divisors (13587460).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12131660 is a wasteful number, since it uses less digits than its factorization.

12131660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5785 (or 5783 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 12131660 is about 3483.0532582779. The cubic root of 12131660 is about 229.7770997401. Note that the first 3 decimals are identical.

Adding to 12131660 its reverse (6613121), we get a palindrome (18744781).

The spelling of 12131660 in words is "twelve million, one hundred thirty-one thousand, six hundred sixty".