Q: Is 136,521 a Prime Number?
A: No, 136,521 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 136521 can be evenly divided by 1 3 7 9 11 21 33 63 77 99 197 231 591 693 1,379 1,773 2,167 4,137 6,501 12,411 15,169 19,503 45,507 and 136,521, with no remainder.
Since 136,521 cannot be divided by just 1 and 136,521, it is not a prime number.