Q: Is 1,311,513 a Prime Number?
A: No, 1,311,513 is not a prime number.
A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 1311513 can be evenly divided by 1 3 7 19 21 57 133 173 361 399 519 1,083 1,211 2,527 3,287 3,633 7,581 9,861 23,009 62,453 69,027 187,359 437,171 and 1,311,513, with no remainder.
Since 1,311,513 cannot be divided by just 1 and 1,311,513, it is not a prime number.