12187089 has 12 divisors (see below), whose sum is σ = 17661072. Its totient is φ = 8098200.

The previous prime is 12187073. The next prime is 12187117. The reversal of 12187089 is 98078121.

It is not a de Polignac number, because 12187089 - 2⁴ = 12187073 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12187009) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 934 + ... + 5024.

It is an arithmetic number, because the mean of its divisors is an integer number (1471756).

Almost surely, 2^12187089 is an apocalyptic number.

It is an amenable number.

12187089 is a deficient number, since it is larger than the sum of its proper divisors (5473983).

12187089 is a wasteful number, since it uses less digits than its factorization.

12187089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4428 (or 4425 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 36.

The square root of 12187089 is about 3491.0011458033. The cubic root of 12187089 is about 230.1265151467.

The spelling of 12187089 in words is "twelve million, one hundred eighty-seven thousand, eighty-nine".