191541 has 12 divisors (see below), whose sum is σ = 297312. Its totient is φ = 109368.

The previous prime is 191537. The next prime is 191551. The reversal of 191541 is 145191.

It is not a de Polignac number, because 191541 - 2² = 191537 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

191541 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191531) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 505 + ... + 798.

It is an arithmetic number, because the mean of its divisors is an integer number (24776).

2¹⁹¹⁵⁴¹ is an apocalyptic number.

It is an amenable number.

191541 is a deficient number, since it is larger than the sum of its proper divisors (105771).

191541 is a wasteful number, since it uses less digits than its factorization.

191541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1320 (or 1313 counting only the distinct ones).

The product of its digits is 180, while the sum is 21.

The square root of 191541 is about 437.6539729055. The cubic root of 191541 is about 57.6439744248.

The spelling of 191541 in words is "one hundred ninety-one thousand, five hundred forty-one".