Q: Is 15,420 a Prime Number?
A: No, 15,420 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 15420 can be evenly divided by 1 2 3 4 5 6 10 12 15 20 30 60 257 514 771 1,028 1,285 1,542 2,570 3,084 3,855 5,140 7,710 and 15,420, with no remainder.
Since 15,420 cannot be divided by just 1 and 15,420, it is not a prime number.