Q: Is 278,000 a Prime Number?
A: No, 278,000 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 278000 can be evenly divided by 1 2 4 5 8 10 16 20 25 40 50 80 100 125 139 200 250 278 400 500 556 695 1,000 1,112 1,390 2,000 2,224 2,780 3,475 5,560 6,950 11,120 13,900 17,375 27,800 34,750 55,600 69,500 139,000 and 278,000, with no remainder.
Since 278,000 cannot be divided by just 1 and 278,000, it is not a prime number.