144

144 is a natural number that follows 143 and precedes 145. In mathematics, it is notable as a perfect square, equal to 12 squared (12^2), and its prime factorization is 2^4 × 3^2. It has 15 positive divisors. In base-10 arithmetic, 144 is a Harshad number because it is divisible by the sum of its digits (1 + 4 + 4 = 9; 144 ÷ 9 = 16). Its common representations include binary 10010000, octal 220, hexadecimal 0x90, and Roman numerals CXLIV.

Culturally and practically, 144 is widely recognized as a gross, defined as 12 dozen. A great gross is 12 gross, or 1,728. The number also appears in geometry and counting contexts such as a 12 × 12 grid containing 144 unit squares. In timekeeping, 144 minutes equals 2 hours and 24 minutes. In astronomy, 144 Vibilia is a main-belt asteroid.

Religious and literary traditions sometimes use 144 as a symbolic figure; for example, the biblical Book of Revelation mentions 144,000 sealed individuals. While 144 shares properties with other square numbers and composite figures, it is not itself a triangular, tetrahedral, or other simple figurate number beyond its square status.

Overall, 144 is a multifaceted integer with mathematical, numerical, and cultural significance, commonly encountered in measurements, representations, and symbolic references.