Q: Is 421,615 a Prime Number?
A: No, 421,615 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 421615 can be evenly divided by 1 5 37 43 53 185 215 265 1,591 1,961 2,279 7,955 9,805 11,395 84,323 and 421,615, with no remainder.
Since 421,615 cannot be divided by just 1 and 421,615, it is not a prime number.