Yes, 144 is a rational number.
A rational number is defined as any number that can be expressed as the quotient or fraction of two integers, where the denominator is not zero. Since 144 can be written as 144/1, it fits the definition of a rational number.
Moreover, all integers are considered rational numbers because you can always express them as a fraction with 1 as the denominator. Therefore, 144 is not only a rational number, but it’s also a whole number.