260645 has 16 divisors (see below), whose sum is σ = 390528. Its totient is φ = 162240.

The previous prime is 260629. The next prime is 260647. The reversal of 260645 is 546062.

It is not a de Polignac number, because 260645 - 2⁴ = 260629 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 260645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (260647) 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 15 ways as a sum of consecutive naturals, for example, 47 + ... + 723.

It is an arithmetic number, because the mean of its divisors is an integer number (24408).

2²⁶⁰⁶⁴⁵ is an apocalyptic number.

It is an amenable number.

260645 is a deficient number, since it is larger than the sum of its proper divisors (129883).

260645 is a wasteful number, since it uses less digits than its factorization.

260645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 260645 is about 510.5340341251. The cubic root of 260645 is about 63.8777778059.

The spelling of 260645 in words is "two hundred sixty thousand, six hundred forty-five".