Q: Is 642,616 a Prime Number?
A: No, 642,616 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 642616 can be evenly divided by 1 2 4 8 13 26 37 52 74 104 148 167 296 334 481 668 962 1,336 1,924 2,171 3,848 4,342 6,179 8,684 12,358 17,368 24,716 49,432 80,327 160,654 321,308 and 642,616, with no remainder.
Since 642,616 cannot be divided by just 1 and 642,616, it is not a prime number.