5421

5421 is a natural number that lies between 5420 and 5422. It is a composite number with prime factorization 3 × 13 × 139, making it square-free. The divisors are 1, 3, 13, 39, 139, 417, 1807, and 5421. Consequently, the Euler totient φ(5421) equals 3312, and the number has eight positive divisors.

Representations in different bases show its numeral forms: in binary, 1010100101101; in octal, 12455; and in hexadecimal, 0x152D. Its digital root is 3, since the sum of its digits is 12 (1+2, then 1+2 = 3), indicating divisibility by 3. It is odd and not divisible by 5.

In mathematical terms, 5421 is the product of three distinct primes, so it is not a prime, not a power, and not a perfect square or cube. It is congruent to 1 modulo 4 (5421 ≡ 1 mod 4) and to 5 modulo 8 (5421 ≡ 5 mod 8).

Outside pure number theory, 5421 may appear as a designation in catalogs, part numbers, or identifiers in various systems. It can serve as a model number, a serial identifier, or a catalog entry, though specific items depend on the issuing organization.

---