Q: Is 561,564 a Prime Number?
A: No, 561,564 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 561564 can be evenly divided by 1 2 3 4 6 9 12 18 19 36 38 57 76 114 171 228 342 684 821 1,642 2,463 3,284 4,926 7,389 9,852 14,778 15,599 29,556 31,198 46,797 62,396 93,594 140,391 187,188 280,782 and 561,564, with no remainder.
Since 561,564 cannot be divided by just 1 and 561,564, it is not a prime number.