Q: Is 1,601,664 a Prime Number?
A: No, 1,601,664 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 1601664 can be evenly divided by 1 2 3 4 6 8 12 16 24 32 43 48 64 86 96 97 128 129 172 192 194 258 291 344 384 388 516 582 688 776 1,032 1,164 1,376 1,552 2,064 2,328 2,752 3,104 4,128 4,171 4,656 5,504 6,208 8,256 8,342 9,312 12,416 12,513 16,512 16,684 18,624 25,026 33,368 37,248 50,052 66,736 100,104 133,472 200,208 266,944 400,416 533,888 800,832 and 1,601,664, with no remainder.
Since 1,601,664 cannot be divided by just 1 and 1,601,664, it is not a prime number.