12180506 has 12 divisors (see below), whose sum is σ = 19784862. Its totient is φ = 5621616.

The previous prime is 12180503. The next prime is 12180527. The reversal of 12180506 is 60508121.

It can be written as a sum of positive squares in 3 ways, for example, as 3389281 + 8791225 = 1841^2 + 2965^2 .

It is not an unprimeable number, because it can be changed into a prime (12180503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17681 + ... + 18356.

Almost surely, 2^12180506 is an apocalyptic number.

12180506 is a deficient number, since it is larger than the sum of its proper divisors (7604356).

12180506 is a wasteful number, since it uses less digits than its factorization.

12180506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36065 (or 36052 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 12180506 is about 3490.0581657044. The cubic root of 12180506 is about 230.0850724992.

Adding to 12180506 its reverse (60508121), we get a palindrome (72688627).

The spelling of 12180506 in words is "twelve million, one hundred eighty thousand, five hundred six".