Q: Is 2,139,678 a Prime Number?
A: No, 2,139,678 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 2139678 can be evenly divided by 1 2 3 6 9 18 29 58 87 174 261 522 4,099 8,198 12,297 24,594 36,891 73,782 118,871 237,742 356,613 713,226 1,069,839 and 2,139,678, with no remainder.
Since 2,139,678 cannot be divided by just 1 and 2,139,678, it is not a prime number.