85205861 has 8 divisors (see below), whose sum is σ = 96589920. Its totient is φ = 74511792.

The previous prime is 85205851. The next prime is 85205863. The reversal of 85205861 is 16850258.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85205861 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85205863) 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 7 ways as a sum of consecutive naturals, for example, 172235 + ... + 172728.

It is an arithmetic number, because the mean of its divisors is an integer number (12073740).

Almost surely, 2^85205861 is an apocalyptic number.

It is an amenable number.

85205861 is a deficient number, since it is larger than the sum of its proper divisors (11384059).

85205861 is a wasteful number, since it uses less digits than its factorization.

85205861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344995.

The product of its (nonzero) digits is 19200, while the sum is 35.

The square root of 85205861 is about 9230.7020859737. The cubic root of 85205861 is about 440.0376362434.

The spelling of 85205861 in words is "eighty-five million, two hundred five thousand, eight hundred sixty-one".