The number of numbers needed to paginate a 450-page novel depended on the format and arrangement of the pages. The following are some possible scenarios: 1. Arrange by chapter: If the novel has 10 chapters, there will be a page number between each chapter. A total of 10 page numbers will be needed. If the novel had 450 chapters, it would need 4500 pages. 2. Arrange by page: If the novel has 450 pages but there are no page numbers between each page but an individual number, then you need to arrange a page number for each page, a total of 450 pages. 3. Arrange by word count: If the total word count of the novel is 450000 words, then you can make a total page number for the novel according to the word count and then make a page number for each chapter or page. A total of 450 pages were required. Therefore, to answer this question, one needed to know the specific page numbering and the total number of words.