12381166 has 8 divisors (see below), whose sum is σ = 21224880. Its totient is φ = 5306208.

The previous prime is 12381113. The next prime is 12381167. The reversal of 12381166 is 66118321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12381167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 442171 + ... + 442198.

It is an arithmetic number, because the mean of its divisors is an integer number (2653110).

Almost surely, 2^12381166 is an apocalyptic number.

12381166 is a deficient number, since it is larger than the sum of its proper divisors (8843714).

12381166 is an equidigital number, since it uses as much as digits as its factorization.

12381166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 884378.

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

The square root of 12381166 is about 3518.6881078038. The cubic root of 12381166 is about 231.3416606687.

Adding to 12381166 its reverse (66118321), we get a palindrome (78499487).

The spelling of 12381166 in words is "twelve million, three hundred eighty-one thousand, one hundred sixty-six".