Q: Is 921,225 a Prime Number?
A: No, 921,225 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 921225 can be evenly divided by 1 3 5 15 25 71 75 173 213 355 519 865 1,065 1,775 2,595 4,325 5,325 12,283 12,975 36,849 61,415 184,245 307,075 and 921,225, with no remainder.
Since 921,225 cannot be divided by just 1 and 921,225, it is not a prime number.