Is 124858309 a prime number?
It is possible to find out using mathematical methods whether a given integer is a prime number or not.
Yes, 124 858 309 is a prime number.
Indeed, the definition of a prime numbers is to have exactly two distinct positive divisors, 1 and itself. A number is a divisor of another number when the remainder of Euclid’s division of the second one by the first one is zero. Concerning the number 124 858 309, the only two divisors are 1 and 124 858 309. Therefore 124 858 309 is a prime number.
As a consequence, 124 858 309 is only a multiple of 1 and 124 858 309.
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Since 124858309 is a prime number, 124858309 is also a deficient number, that is to say 124858309 is a natural integer that is strictly larger than the sum of its proper divisors, i.e., the divisors of 124858309 without 124858309 itself (that is 1, by definition!).