85000261 has 4 divisors (see below), whose sum is σ = 85054572. Its totient is φ = 84945952.

The previous prime is 85000259. The next prime is 85000273. The reversal of 85000261 is 16200058.

It is a happy number.

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 72148036 + 12852225 = 8494^2 + 3585^2 .

It is a cyclic number.

It is not a de Polignac number, because 85000261 - 2¹ = 85000259 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85000231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24736 + ... + 27961.

It is an arithmetic number, because the mean of its divisors is an integer number (21263643).

Almost surely, 2^85000261 is an apocalyptic number.

It is an amenable number.

85000261 is a deficient number, since it is larger than the sum of its proper divisors (54311).

85000261 is a wasteful number, since it uses less digits than its factorization.

85000261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54310.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 85000261 is about 9219.5586119944. The cubic root of 85000261 is about 439.6834172438.

The spelling of 85000261 in words is "eighty-five million, two hundred sixty-one", and thus it is an aban number.