Q: Is 421,560 a Prime Number?
A: No, 421,560 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 421560 can be evenly divided by 1 2 3 4 5 6 8 9 10 12 15 18 20 24 30 36 40 45 60 72 90 120 180 360 1,171 2,342 3,513 4,684 5,855 7,026 9,368 10,539 11,710 14,052 17,565 21,078 23,420 28,104 35,130 42,156 46,840 52,695 70,260 84,312 105,390 140,520 210,780 and 421,560, with no remainder.
Since 421,560 cannot be divided by just 1 and 421,560, it is not a prime number.