12143771 has 4 divisors (see below), whose sum is σ = 12251352. Its totient is φ = 12036192.

The previous prime is 12143767. The next prime is 12143773. The reversal of 12143771 is 17734121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17734121 = 389 ⋅45589.

It is a cyclic number.

It is not a de Polignac number, because 12143771 - 2² = 12143767 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12143771.

It is not an unprimeable number, because it can be changed into a prime (12143773) 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 3 ways as a sum of consecutive naturals, for example, 53621 + ... + 53846.

It is an arithmetic number, because the mean of its divisors is an integer number (3062838).

Almost surely, 2^12143771 is an apocalyptic number.

12143771 is a deficient number, since it is larger than the sum of its proper divisors (107581).

12143771 is a wasteful number, since it uses less digits than its factorization.

12143771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107580.

The product of its digits is 1176, while the sum is 26.

The square root of 12143771 is about 3484.7913854347. The cubic root of 12143771 is about 229.8535362414.

Adding to 12143771 its reverse (17734121), we get a palindrome (29877892).

The spelling of 12143771 in words is "twelve million, one hundred forty-three thousand, seven hundred seventy-one".