Q: Is 2,640,564 a Prime Number?
A: No, 2,640,564 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 2640564 can be evenly divided by 1 2 3 4 6 9 12 18 36 41 82 123 164 246 369 492 738 1,476 1,789 3,578 5,367 7,156 10,734 16,101 21,468 32,202 64,404 73,349 146,698 220,047 293,396 440,094 660,141 880,188 1,320,282 and 2,640,564, with no remainder.
Since 2,640,564 cannot be divided by just 1 and 2,640,564, it is not a prime number.