4123

4123 is a natural number that lies between 4122 and 4124. In decimal notation it is a four-digit integer.

Mathematically, 4123 factors as 7 × 19 × 31, so it is composite. It is square-free, since no prime factor repeats. The eight positive divisors are 1, 7, 19, 31, 133, 217, 589, and 4123. The sum of its digits is 10, giving a digital root of 1. It is not divisible by 2, 3, 5, or 9, but it is divisible by 7, 19, and 31.

Representations in other bases: in hexadecimal it is 0x101B, and in binary it is 1000000011011.

Its digits form a permutation of the digits 1 through 4, a common example used in illustrating digit permutations. As a number, it is not commonly associated with any major constants or widely cited events; it is primarily encountered as a decimal integer in arithmetic contexts or as an arbitrary identifier in catalogs and datasets.