Q: Is 1,128,561 a Prime Number?
A: No, 1,128,561 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 1128561 can be evenly divided by 1 3 7 21 61 183 427 881 1,281 2,643 6,167 18,501 53,741 161,223 376,187 and 1,128,561, with no remainder.
Since 1,128,561 cannot be divided by just 1 and 1,128,561, it is not a prime number.