Q: Is 285,420 a Prime Number?
A: No, 285,420 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 285420 can be evenly divided by 1 2 3 4 5 6 10 12 15 20 30 60 67 71 134 142 201 213 268 284 335 355 402 426 670 710 804 852 1,005 1,065 1,340 1,420 2,010 2,130 4,020 4,260 4,757 9,514 14,271 19,028 23,785 28,542 47,570 57,084 71,355 95,140 142,710 and 285,420, with no remainder.
Since 285,420 cannot be divided by just 1 and 285,420, it is not a prime number.