191085 has 8 divisors (see below), whose sum is σ = 305760. Its totient is φ = 101904.

The previous prime is 191071. The next prime is 191089. The reversal of 191085 is 580191.

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

It is not a de Polignac number, because 191085 - 2⁶ = 191021 is a prime.

It is a super-3 number, since 3×191085³ = 20931533386617375, which contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191089) 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, 6355 + ... + 6384.

It is an arithmetic number, because the mean of its divisors is an integer number (38220).

2¹⁹¹⁰⁸⁵ is an apocalyptic number.

191085 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

191085 is a deficient number, since it is larger than the sum of its proper divisors (114675).

191085 is a wasteful number, since it uses less digits than its factorization.

191085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12747.

The product of its (nonzero) digits is 360, while the sum is 24.

The square root of 191085 is about 437.1327029633. The cubic root of 191085 is about 57.5981939056.

The spelling of 191085 in words is "one hundred ninety-one thousand, eighty-five".