Q: Is 1,142,505 a Prime Number?
A: No, 1,142,505 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 1142505 can be evenly divided by 1 3 5 7 9 13 15 21 27 31 35 39 45 63 65 81 91 93 105 117 135 155 189 195 217 273 279 315 351 403 405 455 465 567 585 651 819 837 945 1,053 1,085 1,209 1,365 1,395 1,755 1,953 2,015 2,457 2,511 2,821 2,835 3,255 3,627 4,095 4,185 5,265 5,859 6,045 7,371 8,463 9,765 10,881 12,285 12,555 14,105 17,577 18,135 25,389 29,295 32,643 36,855 42,315 54,405 76,167 87,885 126,945 163,215 228,501 380,835 and 1,142,505, with no remainder.
Since 1,142,505 cannot be divided by just 1 and 1,142,505, it is not a prime number.