12105189 has 12 divisors (see below), whose sum is σ = 17560972. Its totient is φ = 8035200.

The previous prime is 12105167. The next prime is 12105193. The reversal of 12105189 is 98150121.

It can be written as a sum of positive squares in 2 ways, for example, as 6502500 + 5602689 = 2550^2 + 2367^2 .

It is not a de Polignac number, because 12105189 - 2¹¹ = 12103141 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 (12100189) 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, 622 + ... + 4959.

Almost surely, 2^12105189 is an apocalyptic number.

It is an amenable number.

12105189 is a deficient number, since it is larger than the sum of its proper divisors (5455783).

12105189 is a wasteful number, since it uses less digits than its factorization.

12105189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5828 (or 5825 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 27.

The square root of 12105189 is about 3479.2512125456. The cubic root of 12105189 is about 229.6098552771.

The spelling of 12105189 in words is "twelve million, one hundred five thousand, one hundred eighty-nine".