Q: Is 42,720 a Prime Number?
A: No, 42,720 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 42720 can be evenly divided by 1 2 3 4 5 6 8 10 12 15 16 20 24 30 32 40 48 60 80 89 96 120 160 178 240 267 356 445 480 534 712 890 1,068 1,335 1,424 1,780 2,136 2,670 2,848 3,560 4,272 5,340 7,120 8,544 10,680 14,240 21,360 and 42,720, with no remainder.
Since 42,720 cannot be divided by just 1 and 42,720, it is not a prime number.