12180191 has 8 divisors (see below), whose sum is σ = 12492480. Its totient is φ = 11870208.

The previous prime is 12180187. The next prime is 12180199. The reversal of 12180191 is 19108121.

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

It is a cyclic number.

It is not a de Polignac number, because 12180191 - 2² = 12180187 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12180199) 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 7 ways as a sum of consecutive naturals, for example, 15455 + ... + 16223.

It is an arithmetic number, because the mean of its divisors is an integer number (1561560).

Almost surely, 2^12180191 is an apocalyptic number.

12180191 is a deficient number, since it is larger than the sum of its proper divisors (312289).

12180191 is an equidigital number, since it uses as much as digits as its factorization.

12180191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1153.

The product of its (nonzero) digits is 144, while the sum is 23.

The square root of 12180191 is about 3490.0130372249. The cubic root of 12180191 is about 230.0830890725.

The spelling of 12180191 in words is "twelve million, one hundred eighty thousand, one hundred ninety-one".