Q: Is 261,840 a Prime Number?
A: No, 261,840 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 261840 can be evenly divided by 1 2 3 4 5 6 8 10 12 15 16 20 24 30 40 48 60 80 120 240 1,091 2,182 3,273 4,364 5,455 6,546 8,728 10,910 13,092 16,365 17,456 21,820 26,184 32,730 43,640 52,368 65,460 87,280 130,920 and 261,840, with no remainder.
Since 261,840 cannot be divided by just 1 and 261,840, it is not a prime number.