261006085 has 8 divisors (see below), whose sum is σ = 313305336. Its totient is φ = 208739520.

The previous prime is 261006043. The next prime is 261006091. The reversal of 261006085 is 580600162.

261006085 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 184932801 + 76073284 = 13599^2 + 8722^2 .

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

It is not a de Polignac number, because 261006085 - 2¹⁹ = 260481797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15795 + ... + 27775.

It is an arithmetic number, because the mean of its divisors is an integer number (39163167).

Almost surely, 2^261006085 is an apocalyptic number.

It is an amenable number.

261006085 is a deficient number, since it is larger than the sum of its proper divisors (52299251).

261006085 is a wasteful number, since it uses less digits than its factorization.

261006085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16343.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 261006085 is about 16155.6827463280. The cubic root of 261006085 is about 639.0726192466.

The spelling of 261006085 in words is "two hundred sixty-one million, six thousand, eighty-five".