12105389 has 8 divisors (see below), whose sum is σ = 12380160. Its totient is φ = 11833200.

The previous prime is 12105361. The next prime is 12105391. The reversal of 12105389 is 98350121.

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

It is a cyclic number.

It is not a de Polignac number, because 12105389 - 2⁸ = 12105133 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 (12105319) 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, 11132 + ... + 12170.

It is an arithmetic number, because the mean of its divisors is an integer number (1547520).

Almost surely, 2^12105389 is an apocalyptic number.

It is an amenable number.

12105389 is a deficient number, since it is larger than the sum of its proper divisors (274771).

12105389 is a wasteful number, since it uses less digits than its factorization.

12105389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1291.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 12105389 is about 3479.2799542434. The cubic root of 12105389 is about 229.6111197960.

The spelling of 12105389 in words is "twelve million, one hundred five thousand, three hundred eighty-nine".