Q: Is 121,840 a Prime Number?
A: No, 121,840 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 121840 can be evenly divided by 1 2 4 5 8 10 16 20 40 80 1,523 3,046 6,092 7,615 12,184 15,230 24,368 30,460 60,920 and 121,840, with no remainder.
Since 121,840 cannot be divided by just 1 and 121,840, it is not a prime number.