120

120 is a natural number that follows 119 and precedes 121. It is used in arithmetic, measurement, and various fields as a fixed quantity.

In mathematics, 120 has several notable properties. Its prime factorization is 2^3 × 3 × 5, and it has 16 divisors, making it a highly composite number at its size. The sum of all divisors of 120 is 360, so the sum of its proper divisors is 240. Consequently, 120 is an abundant number. It also equals 5!, linking it to factorials and combinatorics.

In numeral forms, 120 is written as CXX in Roman numerals. In other bases, it is 1111000 in binary, 170 in octal, and 0x78 in hexadecimal. These representations reflect its value across different counting systems.

120 appears in a variety of practical contexts. In time, 120 minutes equal two hours, and in music, 120 beats per minute (BPM) is a common tempo marking. In geography, the 120th meridian east and the 120th meridian west are lines of longitude used to describe location. In science, the atomic-number concept places 120 as a hypothetical element; the temporary name unbinilium (Ubn) is used for element 120 until it is discovered and officially named.

Overall, 120 is notable in number theory for its divisor properties, in everyday usage as a convenient unit of time and tempo, and as a reference point in numeral systems and geographic terminology.