1×105

1×105 denotes the product of 1 and 105. In ordinary arithmetic this equals 105, because multiplying by 1 leaves a number unchanged. If the notation were intended as 1×10^5 (a common scientific notation form), the value would be 100,000; however, the expression as written is most straightforwardly interpreted as 105.

105 is a positive integer. Its prime factorization is 3 × 5 × 7, meaning it is the product of three consecutive primes. Consequently, 105 has eight positive divisors: 1, 3, 5, 7, 15, 21, 35, and 105. It is divisible by 3 and by 5, but not by 2 or 4. In modular arithmetic, 105 is congruent to 0 modulo 3, 5, and 7.

Representations of 105 in different numeral systems include binary and hexadecimal: 105 in binary is 1101001, and in hexadecimal it is 0x69. In Roman numerals, 105 is written as CV (100 plus 5).

Context and usage: as a natural number, 105 follows 104 and precedes 106. It features in various cultural and scientific contexts where counts of 105 are relevant, such as describing a duration of roughly three and a half months (105 days) or a measurement value in certain engineering or historical datasets. The fact that 105 is the product of three consecutive primes makes it a notable example in discussions of factorization and divisor structure.