Q: Is 1,243,920 a Prime Number?
A: No, 1,243,920 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 1243920 can be evenly divided by 1 2 3 4 5 6 8 10 12 15 16 20 24 30 40 48 60 71 73 80 120 142 146 213 219 240 284 292 355 365 426 438 568 584 710 730 852 876 1,065 1,095 1,136 1,168 1,420 1,460 1,704 1,752 2,130 2,190 2,840 2,920 3,408 3,504 4,260 4,380 5,183 5,680 5,840 8,520 8,760 10,366 15,549 17,040 17,520 20,732 25,915 31,098 41,464 51,830 62,196 77,745 82,928 103,660 124,392 155,490 207,320 248,784 310,980 414,640 621,960 and 1,243,920, with no remainder.
Since 1,243,920 cannot be divided by just 1 and 1,243,920, it is not a prime number.