Q: Is 402,560 a Prime Number?
A: No, 402,560 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 402560 can be evenly divided by 1 2 4 5 8 10 16 17 20 32 34 37 40 64 68 74 80 85 128 136 148 160 170 185 272 296 320 340 370 544 592 629 640 680 740 1,088 1,184 1,258 1,360 1,480 2,176 2,368 2,516 2,720 2,960 3,145 4,736 5,032 5,440 5,920 6,290 10,064 10,880 11,840 12,580 20,128 23,680 25,160 40,256 50,320 80,512 100,640 201,280 and 402,560, with no remainder.
Since 402,560 cannot be divided by just 1 and 402,560, it is not a prime number.