12189867 has 8 divisors (see below), whose sum is σ = 17209296. Its totient is φ = 7648512.

The previous prime is 12189857. The next prime is 12189869. The reversal of 12189867 is 76898121.

12189867 is nontrivially palindromic in base 16.

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

It is not a de Polignac number, because 12189867 - 2⁶ = 12189803 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12189869) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119458 + ... + 119559.

It is an arithmetic number, because the mean of its divisors is an integer number (2151162).

Almost surely, 2^12189867 is an apocalyptic number.

12189867 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

12189867 is a deficient number, since it is larger than the sum of its proper divisors (5019429).

12189867 is a wasteful number, since it uses less digits than its factorization.

12189867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239037.

The product of its digits is 48384, while the sum is 42.

The square root of 12189867 is about 3491.3990032650. The cubic root of 12189867 is about 230.1439993025.

The spelling of 12189867 in words is "twelve million, one hundred eighty-nine thousand, eight hundred sixty-seven".