191942 has 4 divisors (see below), whose sum is σ = 287916. Its totient is φ = 95970.

The previous prime is 191929. The next prime is 191953. The reversal of 191942 is 249191.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 249191 = 211 ⋅1181.

It is a congruent number.

It is an unprimeable number.

191942 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 as a sum of consecutive naturals, namely, 47984 + ... + 47987.

It is an arithmetic number, because the mean of its divisors is an integer number (71979).

2¹⁹¹⁹⁴² is an apocalyptic number.

191942 is a deficient number, since it is larger than the sum of its proper divisors (95974).

191942 is an equidigital number, since it uses as much as digits as its factorization.

191942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95973.

The product of its digits is 648, while the sum is 26.

The square root of 191942 is about 438.1118578628. Note that the first 3 decimals coincide. The cubic root of 191942 is about 57.6841731665.

The spelling of 191942 in words is "one hundred ninety-one thousand, nine hundred forty-two".