Q: Is 921,840 a Prime Number?
A: No, 921,840 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 921840 can be evenly divided by 1 2 3 4 5 6 8 10 12 15 16 20 23 24 30 40 46 48 60 69 80 92 115 120 138 167 184 230 240 276 334 345 368 460 501 552 668 690 835 920 1,002 1,104 1,336 1,380 1,670 1,840 2,004 2,505 2,672 2,760 3,340 3,841 4,008 5,010 5,520 6,680 7,682 8,016 10,020 11,523 13,360 15,364 19,205 20,040 23,046 30,728 38,410 40,080 46,092 57,615 61,456 76,820 92,184 115,230 153,640 184,368 230,460 307,280 460,920 and 921,840, with no remainder.
Since 921,840 cannot be divided by just 1 and 921,840, it is not a prime number.