12066181 has 4 divisors (see below), whose sum is σ = 12392332. Its totient is φ = 11740032.

The previous prime is 12066179. The next prime is 12066193. The reversal of 12066181 is 18166021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11115556 + 950625 = 3334^2 + 975^2 .

It is a cyclic number.

It is not a de Polignac number, because 12066181 - 2¹ = 12066179 is a prime.

It is a super-2 number, since 2×12066181² = 291185447849522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12066151) 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 3 ways as a sum of consecutive naturals, for example, 163020 + ... + 163093.

It is an arithmetic number, because the mean of its divisors is an integer number (3098083).

Almost surely, 2^12066181 is an apocalyptic number.

It is an amenable number.

12066181 is a deficient number, since it is larger than the sum of its proper divisors (326151).

12066181 is an equidigital number, since it uses as much as digits as its factorization.

12066181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326150.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 12066181 is about 3473.6408852960. The cubic root of 12066181 is about 229.3629567733.

The spelling of 12066181 in words is "twelve million, sixty-six thousand, one hundred eighty-one".