143

is the integer between.

Math features

 * 143 is an odd number.
 * 143 is a number of the form n2 - 1. Therefore, it is also of the form (n - 1)(n + 1).
 * 143 is a composite number.
 * 143 is a semiprime.
 * 143 is a deficient number.

Factor of 1001
Being a factor of 1001, any 6-digit number of the form XYZXYZ, is equal to XYZ &times; 7 &times; 143.