12105423 has 16 divisors (see below), whose sum is σ = 19564800. Its totient is φ = 7336440.

The previous prime is 12105421. The next prime is 12105427. The reversal of 12105423 is 32450121.

12105423 is a `hidden beast` number, since 121 + 0 + 542 + 3 = 666.

It is not a de Polignac number, because 12105423 - 2¹ = 12105421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12105396 and 12105405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12105421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20083 + ... + 20676.

It is an arithmetic number, because the mean of its divisors is an integer number (1222800).

Almost surely, 2^12105423 is an apocalyptic number.

12105423 is a deficient number, since it is larger than the sum of its proper divisors (7459377).

12105423 is a wasteful number, since it uses less digits than its factorization.

12105423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40779 (or 40773 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 12105423 is about 3479.2848403084. The cubic root of 12105423 is about 229.6113347628.

Adding to 12105423 its reverse (32450121), we get a palindrome (44555544).

The spelling of 12105423 in words is "twelve million, one hundred five thousand, four hundred twenty-three".