102 is a natural number that follows 101 and precedes 103. It is an even number and a composite number, meaning it has divisors other than 1 and itself.

In Roman numerals, 102 is written CII. In binary notation it is 1100110, and in hexadecimal it is 66.

Mathematical properties

The prime factorization of 102 is 2 × 3 × 17. It is therefore a sphenic number: a product of exactly three distinct prime numbers.

The divisors of 102 are 1, 2, 3, 6, 17, 34, 51, and 102. The sum of all divisors is 216, while the sum of proper divisors (all divisors except 102 itself) is 114. Since 114 exceeds 102, it is classified as an abundant number.

102 is also the sum of the first six prime numbers when added together. Additionally, it is half of 51 and one-third of 34.

UncertaintySome properties of special numbers—such as those defined by specific sequences—require established mathematical tools to verify. The properties presented here are those that can be computed directly from the factorization 2 × 3 × 17.

General use

Like other three-digit numbers, 102 is used in identification codes, historical dates, and general counting. Its specific applications—for instance in emergency telephone numbers—vary from place to place.

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