Q: Is 6,420 a Prime Number?
A: No, 6,420 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 6420 can be evenly divided by 1 2 3 4 5 6 10 12 15 20 30 60 107 214 321 428 535 642 1,070 1,284 1,605 2,140 3,210 and 6,420, with no remainder.
Since 6,420 cannot be divided by just 1 and 6,420, it is not a prime number.