Q: Is 640,120 a Prime Number?
A: No, 640,120 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 640120 can be evenly divided by 1 2 4 5 8 10 13 20 26 40 52 65 104 130 260 520 1,231 2,462 4,924 6,155 9,848 12,310 16,003 24,620 32,006 49,240 64,012 80,015 128,024 160,030 320,060 and 640,120, with no remainder.
Since 640,120 cannot be divided by just 1 and 640,120, it is not a prime number.