260065985 has 4 divisors (see below), whose sum is σ = 312079188. Its totient is φ = 208052784.

The previous prime is 260065969. The next prime is 260066003. The reversal of 260065985 is 589560062.

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 108972721 + 151093264 = 10439^2 + 12292^2 .

It is a cyclic number.

It is not a de Polignac number, because 260065985 - 2⁴ = 260065969 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 26006594 + ... + 26006603.

It is an arithmetic number, because the mean of its divisors is an integer number (78019797).

Almost surely, 2^260065985 is an apocalyptic number.

It is an amenable number.

260065985 is a deficient number, since it is larger than the sum of its proper divisors (52013203).

260065985 is an equidigital number, since it uses as much as digits as its factorization.

260065985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52013202.

The product of its (nonzero) digits is 129600, while the sum is 41.

The square root of 260065985 is about 16126.5614747844. The cubic root of 260065985 is about 638.3044188505.

The spelling of 260065985 in words is "two hundred sixty million, sixty-five thousand, nine hundred eighty-five".