12127189 has 4 divisors (see below), whose sum is σ = 12147040. Its totient is φ = 12107340.

The previous prime is 12127183. The next prime is 12127207. The reversal of 12127189 is 98172121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12127189 - 2⁷ = 12127061 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12127189.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12127183) 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 3 ways as a sum of consecutive naturals, for example, 8979 + ... + 10240.

It is an arithmetic number, because the mean of its divisors is an integer number (3036760).

Almost surely, 2^12127189 is an apocalyptic number.

It is an amenable number.

12127189 is a deficient number, since it is larger than the sum of its proper divisors (19851).

12127189 is an equidigital number, since it uses as much as digits as its factorization.

12127189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19850.

The product of its digits is 2016, while the sum is 31.

The square root of 12127189 is about 3482.4113771925. The cubic root of 12127189 is about 229.7488689334.

The spelling of 12127189 in words is "twelve million, one hundred twenty-seven thousand, one hundred eighty-nine".