Q: Is 128,400 a Prime Number?
A: No, 128,400 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 128400 can be evenly divided by 1 2 3 4 5 6 8 10 12 15 16 20 24 25 30 40 48 50 60 75 80 100 107 120 150 200 214 240 300 321 400 428 535 600 642 856 1,070 1,200 1,284 1,605 1,712 2,140 2,568 2,675 3,210 4,280 5,136 5,350 6,420 8,025 8,560 10,700 12,840 16,050 21,400 25,680 32,100 42,800 64,200 and 128,400, with no remainder.
Since 128,400 cannot be divided by just 1 and 128,400, it is not a prime number.