191242 has 4 divisors (see below), whose sum is σ = 286866. Its totient is φ = 95620.

The previous prime is 191237. The next prime is 191249. The reversal of 191242 is 242191.

191242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 242191 = 47 ⋅5153.

It can be written as a sum of positive squares in only one way, i.e., 159201 + 32041 = 399^2 + 179^2 .

It is not an unprimeable number, because it can be changed into a prime (191249) by changing a digit.

191242 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 47809 + ... + 47812.

2¹⁹¹²⁴² is an apocalyptic number.

191242 is a deficient number, since it is larger than the sum of its proper divisors (95624).

191242 is an equidigital number, since it uses as much as digits as its factorization.

191242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95623.

The product of its digits is 144, while the sum is 19.

The square root of 191242 is about 437.3122454265. The cubic root of 191242 is about 57.6139642712.

The spelling of 191242 in words is "one hundred ninety-one thousand, two hundred forty-two".