Q: Is 345,840 a Prime Number?
A: No, 345,840 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 345840 can be evenly divided by 1 2 3 4 5 6 8 10 11 12 15 16 20 22 24 30 33 40 44 48 55 60 66 80 88 110 120 131 132 165 176 220 240 262 264 330 393 440 524 528 655 660 786 880 1,048 1,310 1,320 1,441 1,572 1,965 2,096 2,620 2,640 2,882 3,144 3,930 4,323 5,240 5,764 6,288 7,205 7,860 8,646 10,480 11,528 14,410 15,720 17,292 21,615 23,056 28,820 31,440 34,584 43,230 57,640 69,168 86,460 115,280 172,920 and 345,840, with no remainder.
Since 345,840 cannot be divided by just 1 and 345,840, it is not a prime number.