Q: Is 121,640 a Prime Number?
A: No, 121,640 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 121640 can be evenly divided by 1 2 4 5 8 10 20 40 3,041 6,082 12,164 15,205 24,328 30,410 60,820 and 121,640, with no remainder.
Since 121,640 cannot be divided by just 1 and 121,640, it is not a prime number.