Q: Is 402,129 a Prime Number?
A: No, 402,129 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 402129 can be evenly divided by 1 3 7 9 13 21 39 63 91 117 273 491 819 1,473 3,437 4,419 6,383 10,311 19,149 30,933 44,681 57,447 134,043 and 402,129, with no remainder.
Since 402,129 cannot be divided by just 1 and 402,129, it is not a prime number.