A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 929250 can be evenly divided by 1 2 3 5 6 7 9 10 14 15 18 21 25 30 35 42 45 50 59 63 70 75 90 105 118 125 126 150 175 177 210 225 250 295 315 350 354 375 413 450 525 531 590 630 750 826 875 885 1,050 1,062 1,125 1,239 1,475 1,575 1,750 1,770 2,065 2,250 2,478 2,625 2,655 2,950 3,150 3,717 4,130 4,425 5,250 5,310 6,195 7,375 7,434 7,875 8,850 10,325 12,390 13,275 14,750 15,750 18,585 20,650 22,125 26,550 30,975 37,170 44,250 51,625 61,950 66,375 92,925 103,250 132,750 154,875 185,850 309,750 464,625 and 929,250, with no remainder.
Since 929,250 cannot be divided by just 1 and 929,250, it is not a prime number.