Q: Is 1,321,220 a Prime Number?
A: No, 1,321,220 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 1321220 can be evenly divided by 1 2 4 5 10 20 31 62 124 155 310 620 2,131 4,262 8,524 10,655 21,310 42,620 66,061 132,122 264,244 330,305 660,610 and 1,321,220, with no remainder.
Since 1,321,220 cannot be divided by just 1 and 1,321,220, it is not a prime number.