Q: Is 21,861 a Composite Number?
A: Yes, 21,861 is a composite number.
The number 21,861 can be evenly divided by 1 3 7 9 21 63 347 1,041 2,429 3,123 7,287 and 21,861, with no remainder.
Since 21,861 cannot be divided by just 1 and 21,861, it is a composite number.