144

Number
$144$ (one hundred and forty-four) is:


 * $2^4 \times 3^2$


 * The $12$th square number after $1, 4, 9, 16, 25, 36, 49, 64, 81, 100, 121$:
 * $144 = 12^2 = \left({2^2 \times 3}\right)^2$


 * The $12$th Fibonacci number, after $1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89$:
 * $144 = 55 + 89$