265

265 is an odd composite number with two prime factors. 265's sum of its proper divisors is 59. 265 is the number of derangements possible with 6 digits. That means that it is equivalent to !6. The number 265 is associated with the geometric shape known as the Vesica Piscis. This is shown by having 2 circles overlap in a way that the circumference of each circle touches the center of the other. Archimedes estimated that the ratio of the height of this shape to the width was 265:153 or approximately √3.