191442 has 8 divisors (see below), whose sum is σ = 382896. Its totient is φ = 63812.

The previous prime is 191441. The next prime is 191447. The reversal of 191442 is 244191.

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

191442 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (191441) 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 3 ways as a sum of consecutive naturals, for example, 15948 + ... + 15959.

It is an arithmetic number, because the mean of its divisors is an integer number (47862).

2¹⁹¹⁴⁴² is an apocalyptic number.

191442 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

191442 is a wasteful number, since it uses less digits than its factorization.

191442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31912.

The product of its digits is 288, while the sum is 21.

The square root of 191442 is about 437.5408552353. The cubic root of 191442 is about 57.6340414132.

The spelling of 191442 in words is "one hundred ninety-one thousand, four hundred forty-two".