Q: Is 1,191,528 a Prime Number?
A: No, 1,191,528 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 1191528 can be evenly divided by 1 2 3 4 6 8 9 12 13 18 19 24 26 36 38 39 52 57 67 72 76 78 104 114 117 134 152 156 171 201 228 234 247 268 312 342 402 456 468 494 536 603 684 741 804 871 936 988 1,206 1,273 1,368 1,482 1,608 1,742 1,976 2,223 2,412 2,546 2,613 2,964 3,484 3,819 4,446 4,824 5,092 5,226 5,928 6,968 7,638 7,839 8,892 10,184 10,452 11,457 15,276 15,678 16,549 17,784 20,904 22,914 30,552 31,356 33,098 45,828 49,647 62,712 66,196 91,656 99,294 132,392 148,941 198,588 297,882 397,176 595,764 and 1,191,528, with no remainder.
Since 1,191,528 cannot be divided by just 1 and 1,191,528, it is not a prime number.