259

259 is a natural number that follows 258 and precedes 260. It is an odd composite number formed as the product of two primes, 7 and 37.

Its divisors are 1, 7, 37, and 259, making it a semiprime. The prime factorization is 259 = 7 × 37, with no repeated factors.

In different numeral systems, 259 is written as decimal 259, binary 100000011, octal 403, hexadecimal 0x103, and Roman numerals CCLIX.

In the calendar, the 259th day of a common year is September 16, a date that remains the same in leap years for this day count.

Numerically, 259 is congruent to 1 modulo 3, and is divisible by 7 and 37. The sum of its proper divisors is 45, so 259 is a deficient number. Its digital sum is 16, with a digital root of 7.