Q: Is 561,000 a Prime Number?
A: No, 561,000 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 561000 can be evenly divided by 1 2 3 4 5 6 8 10 11 12 15 17 20 22 24 25 30 33 34 40 44 50 51 55 60 66 68 75 85 88 100 102 110 120 125 132 136 150 165 170 187 200 204 220 250 255 264 275 300 330 340 374 375 408 425 440 500 510 550 561 600 660 680 748 750 825 850 935 1,000 1,020 1,100 1,122 1,275 1,320 1,375 1,496 1,500 1,650 1,700 1,870 2,040 2,125 2,200 2,244 2,550 2,750 2,805 3,000 3,300 3,400 3,740 4,125 4,250 4,488 4,675 5,100 5,500 5,610 6,375 6,600 7,480 8,250 8,500 9,350 10,200 11,000 11,220 12,750 14,025 16,500 17,000 18,700 22,440 23,375 25,500 28,050 33,000 37,400 46,750 51,000 56,100 70,125 93,500 112,200 140,250 187,000 280,500 and 561,000, with no remainder.
Since 561,000 cannot be divided by just 1 and 561,000, it is not a prime number.