Q: Is 345,420 a Prime Number?
A: No, 345,420 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 345420 can be evenly divided by 1 2 3 4 5 6 9 10 12 15 18 19 20 30 36 38 45 57 60 76 90 95 101 114 171 180 190 202 228 285 303 342 380 404 505 570 606 684 855 909 1,010 1,140 1,212 1,515 1,710 1,818 1,919 2,020 3,030 3,420 3,636 3,838 4,545 5,757 6,060 7,676 9,090 9,595 11,514 17,271 18,180 19,190 23,028 28,785 34,542 38,380 57,570 69,084 86,355 115,140 172,710 and 345,420, with no remainder.
Since 345,420 cannot be divided by just 1 and 345,420, it is not a prime number.