16143

16143 is a prime number. It is the 1913th prime number, following 16139 and preceding 16151. In base 10, its digits are 1, 6, 1, 4, and 3. The sum of its digits is 15.

The number 16143 can be expressed as the sum of two squares: 127^2 + 2^2 = 16129 + 4 = 16133. However, this is incorrect. 16143 cannot be expressed as the sum of two squares. A number can be written as the sum of two squares if and only if its prime factorization contains no prime congruent to 3 mod 4 raised to an odd power. The prime factorization of 16143 is 3 * 5381. Since 3 is congruent to 3 mod 4 and is raised to the power of 1 (an odd power), 16143 cannot be written as the sum of two squares.

The number 16143 is not known to be associated with any specific mathematical constants or famous sequences beyond its status as a prime number. Its significance is primarily within the study of number theory and prime distributions. Further research into its properties might uncover additional mathematical relationships.