Number 345 is a three-digit integer that follows 344 and precedes 346. It is an odd number and can be expressed as the sum of three consecutive integers: 114 + 115 + 116 = 345. In Roman numerals, it is represented as CCCXLV. In mathematics, 345 can be factored into prime numbers as 3 × 5 × 23. It is also notable in various contexts, such as in area codes or street numbers. The number is often used in everyday situations, like counting or labeling items.