260345 has 4 divisors (see below), whose sum is σ = 312420. Its totient is φ = 208272.

The previous prime is 260339. The next prime is 260363. The reversal of 260345 is 543062.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 169744 + 90601 = 412^2 + 301^2 .

It is a cyclic number.

It is not a de Polignac number, because 260345 - 2⁴ = 260329 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26030 + ... + 26039.

It is an arithmetic number, because the mean of its divisors is an integer number (78105).

2²⁶⁰³⁴⁵ is an apocalyptic number.

It is an amenable number.

260345 is a deficient number, since it is larger than the sum of its proper divisors (52075).

260345 is an equidigital number, since it uses as much as digits as its factorization.

260345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52074.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 260345 is about 510.2401395422. The cubic root of 260345 is about 63.8532608188.

The spelling of 260345 in words is "two hundred sixty thousand, three hundred forty-five".