12131668 has 6 divisors (see below), whose sum is σ = 21230426. Its totient is φ = 6065832.

The previous prime is 12131653. The next prime is 12131677. The reversal of 12131668 is 86613121.

12131668 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 7033104 + 5098564 = 2652^2 + 2258^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1516455 + ... + 1516462.

Almost surely, 2^12131668 is an apocalyptic number.

It is an amenable number.

12131668 is a deficient number, since it is larger than the sum of its proper divisors (9098758).

12131668 is a wasteful number, since it uses less digits than its factorization.

12131668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3032921 (or 3032919 counting only the distinct ones).

The product of its digits is 1728, while the sum is 28.

The square root of 12131668 is about 3483.0544066954. The cubic root of 12131668 is about 229.7771502475. Note that the first 3 decimals are identical.

Adding to 12131668 its reverse (86613121), we get a palindrome (98744789).

The spelling of 12131668 in words is "twelve million, one hundred thirty-one thousand, six hundred sixty-eight".