191045 has 8 divisors (see below), whose sum is σ = 241440. Its totient is φ = 144720.

The previous prime is 191039. The next prime is 191047. The reversal of 191045 is 540191.

191045 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 191045 - 2¹⁶ = 125509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 911 + ... + 1100.

It is an arithmetic number, because the mean of its divisors is an integer number (30180).

2¹⁹¹⁰⁴⁵ is an apocalyptic number.

It is an amenable number.

191045 is a deficient number, since it is larger than the sum of its proper divisors (50395).

191045 is a wasteful number, since it uses less digits than its factorization.

191045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2035.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 191045 is about 437.0869478719. The cubic root of 191045 is about 57.5941745973.

The spelling of 191045 in words is "one hundred ninety-one thousand, forty-five".