Q: Is 245,421 a Prime Number?
A: No, 245,421 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 245421 can be evenly divided by 1 3 9 11 33 37 67 99 111 201 333 407 603 737 1,221 2,211 2,479 3,663 6,633 7,437 22,311 27,269 81,807 and 245,421, with no remainder.
Since 245,421 cannot be divided by just 1 and 245,421, it is not a prime number.