Q: Is 642,120 a Prime Number?
A: No, 642,120 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 642120 can be evenly divided by 1 2 3 4 5 6 8 10 12 15 20 24 30 40 60 120 5,351 10,702 16,053 21,404 26,755 32,106 42,808 53,510 64,212 80,265 107,020 128,424 160,530 214,040 321,060 and 642,120, with no remainder.
Since 642,120 cannot be divided by just 1 and 642,120, it is not a prime number.