260689 has 8 divisors (see below), whose sum is σ = 306432. Its totient is φ = 218640.

The previous prime is 260677. The next prime is 260713. The reversal of 260689 is 986062.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-260689 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 260689.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (260609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 769 + ... + 1054.

It is an arithmetic number, because the mean of its divisors is an integer number (38304).

2²⁶⁰⁶⁸⁹ is an apocalyptic number.

It is an amenable number.

260689 is a deficient number, since it is larger than the sum of its proper divisors (45743).

260689 is a wasteful number, since it uses less digits than its factorization.

260689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1847.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 260689 is about 510.5771244386. The cubic root of 260689 is about 63.8813720485.

It can be divided in two parts, 260 and 689, that added together give a palindrome (949).

The spelling of 260689 in words is "two hundred sixty thousand, six hundred eighty-nine".