Is 140 a Prime Number?

To determine whether the number 140 is a prime number, it is necessary to check if it has any divisors besides 1 and itself. This involves checking if there are any other numbers that can divide 140 evenly, meaning without leaving a remainder. If such divisors exist, 140 is not a prime number; otherwise, it would be classified as prime.

To quickly check if 140 is a prime number:

Calculate the square root of 140

$\sqrt{140} = 11.83$

Prime numbers less than or equal to 11.83: 2, 3, 5, 7, 11

• 140 is divisible by number: 2, 5, 7.

Since 140 is divisible by a number 2, 5, 7 other than 1 and itself, so it is not a prime number