12189542 has 16 divisors (see below), whose sum is σ = 18662400. Its totient is φ = 5970120.

The previous prime is 12189533. The next prime is 12189553. The reversal of 12189542 is 24598121.

It is a junction number, because it is equal to n+sod(n) for n = 12189499 and 12189508.

It is a congruent number.

It is an unprimeable number.

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, 28067 + ... + 28497.

It is an arithmetic number, because the mean of its divisors is an integer number (1166400).

Almost surely, 2^12189542 is an apocalyptic number.

12189542 is a deficient number, since it is larger than the sum of its proper divisors (6472858).

12189542 is a wasteful number, since it uses less digits than its factorization.

12189542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 691.

The product of its digits is 5760, while the sum is 32.

The square root of 12189542 is about 3491.3524600074. The cubic root of 12189542 is about 230.1419539572.

The spelling of 12189542 in words is "twelve million, one hundred eighty-nine thousand, five hundred forty-two".