Q: Is 1,561,664 a Composite Number?
A: Yes, 1,561,664 is a composite number.
The number 1,561,664 can be evenly divided by 1 2 4 8 13 16 26 32 52 64 104 208 416 832 1,877 3,754 7,508 15,016 24,401 30,032 48,802 60,064 97,604 120,128 195,208 390,416 780,832 and 1,561,664, with no remainder.
Since 1,561,664 cannot be divided by just 1 and 1,561,664, it is a composite number.