12105711 has 6 divisors (see below), whose sum is σ = 17486040. Its totient is φ = 8070468.

The previous prime is 12105647. The next prime is 12105733. The reversal of 12105711 is 11750121.

It is a happy number.

It is not a de Polignac number, because 12105711 - 2⁶ = 12105647 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12105781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 672531 + ... + 672548.

It is an arithmetic number, because the mean of its divisors is an integer number (2914340).

Almost surely, 2^12105711 is an apocalyptic number.

12105711 is a deficient number, since it is larger than the sum of its proper divisors (5380329).

12105711 is a wasteful number, since it uses less digits than its factorization.

12105711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1345085 (or 1345082 counting only the distinct ones).

The product of its (nonzero) digits is 70, while the sum is 18.

The square root of 12105711 is about 3479.3262278780. The cubic root of 12105711 is about 229.6131556420.

Adding to 12105711 its reverse (11750121), we get a palindrome (23855832).

The spelling of 12105711 in words is "twelve million, one hundred five thousand, seven hundred eleven".