Q: Is 21,490 a Prime Number?
A: No, 21,490 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 21490 can be evenly divided by 1 2 5 7 10 14 35 70 307 614 1,535 2,149 3,070 4,298 10,745 and 21,490, with no remainder.
Since 21,490 cannot be divided by just 1 and 21,490, it is not a prime number.