Q: Is 421,312 a Prime Number?
A: No, 421,312 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 421312 can be evenly divided by 1 2 4 8 16 29 32 58 64 116 227 232 454 464 908 928 1,816 1,856 3,632 6,583 7,264 13,166 14,528 26,332 52,664 105,328 210,656 and 421,312, with no remainder.
Since 421,312 cannot be divided by just 1 and 421,312, it is not a prime number.