Q: Is 643,420 a Composite Number?
A: Yes, 643,420 is a composite number.
The number 643,420 can be evenly divided by 1 2 4 5 10 20 53 106 212 265 530 607 1,060 1,214 2,428 3,035 6,070 12,140 32,171 64,342 128,684 160,855 321,710 and 643,420, with no remainder.
Since 643,420 cannot be divided by just 1 and 643,420, it is a composite number.