A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 610200 can be evenly divided by 1 2 3 4 5 6 8 9 10 12 15 18 20 24 25 27 30 36 40 45 50 54 60 72 75 90 100 108 113 120 135 150 180 200 216 225 226 270 300 339 360 450 452 540 565 600 675 678 900 904 1,017 1,080 1,130 1,350 1,356 1,695 1,800 2,034 2,260 2,700 2,712 2,825 3,051 3,390 4,068 4,520 5,085 5,400 5,650 6,102 6,780 8,136 8,475 10,170 11,300 12,204 13,560 15,255 16,950 20,340 22,600 24,408 25,425 30,510 33,900 40,680 50,850 61,020 67,800 76,275 101,700 122,040 152,550 203,400 305,100 and 610,200, with no remainder.
Since 610,200 cannot be divided by just 1 and 610,200, it is not a prime number.