12105317 has 16 divisors (see below), whose sum is σ = 14310912. Its totient is φ = 10024560.

The previous prime is 12105307. The next prime is 12105319. The reversal of 12105317 is 71350121.

It is not a de Polignac number, because 12105317 - 2¹⁴ = 12088933 is a prime.

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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39278 + ... + 39584.

It is an arithmetic number, because the mean of its divisors is an integer number (894432).

Almost surely, 2^12105317 is an apocalyptic number.

It is an amenable number.

12105317 is a deficient number, since it is larger than the sum of its proper divisors (2205595).

12105317 is a wasteful number, since it uses less digits than its factorization.

12105317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488.

The product of its (nonzero) digits is 210, while the sum is 20.

The square root of 12105317 is about 3479.2696072595. The cubic root of 12105317 is about 229.6106645708.

Adding to 12105317 its reverse (71350121), we get a palindrome (83455438).

The spelling of 12105317 in words is "twelve million, one hundred five thousand, three hundred seventeen".