Q: Is 21,042,240 a Prime Number?
A: No, 21,042,240 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 21042240 can be evenly divided by 1 2 3 4 5 6 8 10 12 15 16 20 23 24 30 32 40 46 48 60 64 69 80 92 96 115 120 138 160 184 192 230 240 276 320 345 368 460 480 552 690 736 920 953 960 1,104 1,380 1,472 1,840 1,906 2,208 2,760 2,859 3,680 3,812 4,416 4,765 5,520 5,718 7,360 7,624 9,530 11,040 11,436 14,295 15,248 19,060 21,919 22,080 22,872 28,590 30,496 38,120 43,838 45,744 57,180 60,992 65,757 76,240 87,676 91,488 109,595 114,360 131,514 152,480 175,352 182,976 219,190 228,720 263,028 304,960 328,785 350,704 438,380 457,440 526,056 657,570 701,408 876,760 914,880 1,052,112 1,315,140 1,402,816 1,753,520 2,104,224 2,630,280 3,507,040 4,208,448 5,260,560 7,014,080 10,521,120 and 21,042,240, with no remainder.
Since 21,042,240 cannot be divided by just 1 and 21,042,240, it is not a prime number.
| Number | 21,042,238 | 21,042,239 | 21,042,241 | 21,042,242 |
| Prime? | no | no | no | no |