240191 has 4 divisors (see below), whose sum is σ = 274512. Its totient is φ = 205872.

The previous prime is 240173. The next prime is 240197. The reversal of 240191 is 191042.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 240191 - 2¹⁰ = 239167 is a prime.

It is a nialpdrome in base 13.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 240191.

It is not an unprimeable number, because it can be changed into a prime (240197) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17150 + ... + 17163.

It is an arithmetic number, because the mean of its divisors is an integer number (68628).

2²⁴⁰¹⁹¹ is an apocalyptic number.

240191 is a deficient number, since it is larger than the sum of its proper divisors (34321).

240191 is an equidigital number, since it uses as much as digits as its factorization.

240191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34320.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 240191 is about 490.0928483461. The cubic root of 240191 is about 62.1611313424.

The spelling of 240191 in words is "two hundred forty thousand, one hundred ninety-one".