191265085 has 16 divisors (see below), whose sum is σ = 252971712. Its totient is φ = 137664000.

The previous prime is 191265059. The next prime is 191265089. The reversal of 191265085 is 580562191.

It is not a de Polignac number, because 191265085 - 2¹³ = 191256893 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 (191265089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12591 + ... + 23260.

It is an arithmetic number, because the mean of its divisors is an integer number (15810732).

Almost surely, 2^191265085 is an apocalyptic number.

It is an amenable number.

191265085 is a deficient number, since it is larger than the sum of its proper divisors (61706627).

191265085 is a wasteful number, since it uses less digits than its factorization.

191265085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35964.

The product of its (nonzero) digits is 21600, while the sum is 37.

The square root of 191265085 is about 13829.8620745111. The cubic root of 191265085 is about 576.1628238968.

The spelling of 191265085 in words is "one hundred ninety-one million, two hundred sixty-five thousand, eighty-five".