Q: Is 858,920 a Prime Number?
A: No, 858,920 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 858920 can be evenly divided by 1 2 4 5 8 10 20 40 109 197 218 394 436 545 788 872 985 1,090 1,576 1,970 2,180 3,940 4,360 7,880 21,473 42,946 85,892 107,365 171,784 214,730 429,460 and 858,920, with no remainder.
Since 858,920 cannot be divided by just 1 and 858,920, it is not a prime number.