4781

4781 is a natural number that follows 4780 and precedes 4782. In decimal notation it is written as 4781, and in other common bases it has the representations 1001010101101 in binary and 12AD in hexadecimal. The number is odd and composite.

Prime factorization and divisors: 4781 factors as 7 × 683, where 683 is a prime number. Therefore 4781 is a semiprime, a product of exactly two primes. Its divisors are 1, 7, 683, and 4781.

Numerical properties: The sum of the digits of 4781 is 20, giving a digital root of 2. The number is not a perfect square or cube, and it is congruent to 1 modulo 4. In modular arithmetic, it is congruent to 2 modulo 3 and modulo 9, among other residues.

Context and usage: As a specific integer, 4781 is mainly of interest in elementary number theory as an example of a semiprime and to illustrate factorization into two primes. It does not have widely noted historical, scientific, or cultural associations beyond its role in mathematics.

See also: Semiprime, List of natural numbers, Prime factorization.

Notes: The factorization 4781 = 7 × 683 shows that it has exactly four divisors and that its prime factors are distinct. This makes it a simple case study for discussions of composite numbers and factor structure.