Q: Is 505,420 a Prime Number?
A: No, 505,420 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 505420 can be evenly divided by 1 2 4 5 10 20 37 74 148 185 370 683 740 1,366 2,732 3,415 6,830 13,660 25,271 50,542 101,084 126,355 252,710 and 505,420, with no remainder.
Since 505,420 cannot be divided by just 1 and 505,420, it is not a prime number.