Q: Is 128,421 a Composite Number?
A: Yes, 128,421 is a composite number.
The number 128,421 can be evenly divided by 1 3 9 19 57 171 751 2,253 6,759 14,269 42,807 and 128,421, with no remainder.
Since 128,421 cannot be divided by just 1 and 128,421, it is a composite number.