Q: Is 4,221,075 a Prime Number?
A: No, 4,221,075 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 4221075 can be evenly divided by 1 3 5 15 23 25 69 75 115 345 575 1,725 2,447 7,341 12,235 36,705 56,281 61,175 168,843 183,525 281,405 844,215 1,407,025 and 4,221,075, with no remainder.
Since 4,221,075 cannot be divided by just 1 and 4,221,075, it is not a prime number.