Q: Is 686,742 a Prime Number?
A: No, 686,742 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 686742 can be evenly divided by 1 2 3 6 7 14 21 42 83 166 197 249 394 498 581 591 1,162 1,182 1,379 1,743 2,758 3,486 4,137 8,274 16,351 32,702 49,053 98,106 114,457 228,914 343,371 and 686,742, with no remainder.
Since 686,742 cannot be divided by just 1 and 686,742, it is not a prime number.