12131776 has 14 divisors (see below), whose sum is σ = 24074120. Its totient is φ = 6065856.

The previous prime is 12131771. The next prime is 12131789. The reversal of 12131776 is 67713121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12131771) 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 as a sum of consecutive naturals, namely, 94716 + ... + 94843.

It is an arithmetic number, because the mean of its divisors is an integer number (1719580).

Almost surely, 2^12131776 is an apocalyptic number.

12131776 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12131776 is a deficient number, since it is larger than the sum of its proper divisors (11942344).

12131776 is an equidigital number, since it uses as much as digits as its factorization.

12131776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189571 (or 189561 counting only the distinct ones).

The product of its digits is 1764, while the sum is 28.

The square root of 12131776 is about 3483.0699102947. The cubic root of 12131776 is about 229.7778320954. Note that the first 3 decimals are identical.

Adding to 12131776 its reverse (67713121), we get a palindrome (79844897).

The spelling of 12131776 in words is "twelve million, one hundred thirty-one thousand, seven hundred seventy-six".