Q: Is 671,872 a Prime Number?
A: No, 671,872 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 671872 can be evenly divided by 1 2 4 8 16 29 32 58 64 116 128 181 232 362 464 724 928 1,448 1,856 2,896 3,712 5,249 5,792 10,498 11,584 20,996 23,168 41,992 83,984 167,968 335,936 and 671,872, with no remainder.
Since 671,872 cannot be divided by just 1 and 671,872, it is not a prime number.