Q: Is 1,221,520 a Prime Number?
A: No, 1,221,520 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 1221520 can be evenly divided by 1 2 4 5 8 10 16 20 40 80 15,269 30,538 61,076 76,345 122,152 152,690 244,304 305,380 610,760 and 1,221,520, with no remainder.
Since 1,221,520 cannot be divided by just 1 and 1,221,520, it is not a prime number.