12557

12557 is a natural number that falls between 12556 and 12558. In numerical terms, it is odd and composite, and it can be expressed as the product of two primes: 29 and 433.

In mathematics, 12557 is a semiprime, meaning it has exactly two prime factors. Its divisors are 1, 29, 433, and 12557. It is square-free, since none of its prime factors are repeated, and it is not a prime or a perfect power. The digit sum is 20, so it is not divisible by 3, and it does not end in 0 or 5, so it is not divisible by 5.

12557 has straightforward representations in several base systems. In binary it is 11000100001101. In hexadecimal it equals 0x310D, and in octal it is 30415.

In astronomy, the designation 12557 is used as the numeric identifier for a minor planet in asteroid catalogs. As with other such numbers, it serves as a stable reference within scientific databases and publications. Outside of specialized contexts, 12557 may appear as a catalog or serial number in various systems, but it does not carry a single universal meaning beyond its role as a numeric identifier.