Q: Is 515,420 a Prime Number?
A: No, 515,420 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 515420 can be evenly divided by 1 2 4 5 10 20 25,771 51,542 103,084 128,855 257,710 and 515,420, with no remainder.
Since 515,420 cannot be divided by just 1 and 515,420, it is not a prime number.