Q: Is 181,000 a Prime Number?
A: No, 181,000 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 181000 can be evenly divided by 1 2 4 5 8 10 20 25 40 50 100 125 181 200 250 362 500 724 905 1,000 1,448 1,810 3,620 4,525 7,240 9,050 18,100 22,625 36,200 45,250 90,500 and 181,000, with no remainder.
Since 181,000 cannot be divided by just 1 and 181,000, it is not a prime number.