15489

15489 is a positive integer. It is odd and composite, with prime factorization 15489 = 3^2 × 1721, where 1721 is a prime.

The sum of its decimal digits is 27, which makes the number divisible by 9 and by 3, but not by 27. It is not divisible by any even number or by 5. Its prime factorization shows that it is not a perfect square, since the exponent of 1721 is odd.

In base representations, 15489 can be expressed as 11110010000001 in binary and as 0x3C81 in hexadecimal. These representations reflect its decimal factors and indicate its nontrivial structure beyond simple single-digit multipliers.

Geometrically or in common numeric sequences, 15489 is not a triangular number, as solving n(n+1)/2 = 15489 does not yield an integer solution. It is also not a square, given the prime factorization.

Beyond pure math, 15489 functions as a typical example number used in teaching and testing, illustrating how a decimal value can have multiple clean representations in other bases and how its factorization reveals its compositional properties. It does not have notable constants or uniqueyear-like significance in widely cited contexts, and it serves primarily as a numeric reference point within basic number theory.