12131366 has 16 divisors (see below), whose sum is σ = 19655664. Its totient is φ = 5582304.

The previous prime is 12131347. The next prime is 12131369. The reversal of 12131366 is 66313121.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12131369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13796 + ... + 14648.

It is an arithmetic number, because the mean of its divisors is an integer number (1228479).

Almost surely, 2^12131366 is an apocalyptic number.

12131366 is a deficient number, since it is larger than the sum of its proper divisors (7524298).

12131366 is a wasteful number, since it uses less digits than its factorization.

12131366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1415.

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

The square root of 12131366 is about 3483.0110536718. The cubic root of 12131366 is about 229.7752435771.

Adding to 12131366 its reverse (66313121), we get a palindrome (78444487).

The spelling of 12131366 in words is "twelve million, one hundred thirty-one thousand, three hundred sixty-six".