Q: Is 145,420 a Prime Number?
A: No, 145,420 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 145420 can be evenly divided by 1 2 4 5 10 11 20 22 44 55 110 220 661 1,322 2,644 3,305 6,610 7,271 13,220 14,542 29,084 36,355 72,710 and 145,420, with no remainder.
Since 145,420 cannot be divided by just 1 and 145,420, it is not a prime number.