12105671 has 4 divisors (see below), whose sum is σ = 12156144. Its totient is φ = 12055200.

The previous prime is 12105647. The next prime is 12105733. The reversal of 12105671 is 17650121.

12105671 is nontrivially palindromic in base 11.

12105671 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17650121 = 137 ⋅128833.

It is a cyclic number.

It is not a de Polignac number, because 12105671 - 2⁶ = 12105607 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 (12105601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24875 + ... + 25356.

It is an arithmetic number, because the mean of its divisors is an integer number (3039036).

Almost surely, 2^12105671 is an apocalyptic number.

12105671 is a deficient number, since it is larger than the sum of its proper divisors (50473).

12105671 is an equidigital number, since it uses as much as digits as its factorization.

12105671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50472.

The product of its (nonzero) digits is 420, while the sum is 23.

The square root of 12105671 is about 3479.3204796339. The cubic root of 12105671 is about 229.6129027438.

Adding to 12105671 its reverse (17650121), we get a palindrome (29755792).

The spelling of 12105671 in words is "twelve million, one hundred five thousand, six hundred seventy-one".