Q: Is 138,840 a Prime Number?
A: No, 138,840 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 138840 can be evenly divided by 1 2 3 4 5 6 8 10 12 13 15 20 24 26 30 39 40 52 60 65 78 89 104 120 130 156 178 195 260 267 312 356 390 445 520 534 712 780 890 1,068 1,157 1,335 1,560 1,780 2,136 2,314 2,670 3,471 3,560 4,628 5,340 5,785 6,942 9,256 10,680 11,570 13,884 17,355 23,140 27,768 34,710 46,280 69,420 and 138,840, with no remainder.
Since 138,840 cannot be divided by just 1 and 138,840, it is not a prime number.