842191 has 8 divisors (see below), whose sum is σ = 1004544. Its totient is φ = 690360.

The previous prime is 842183. The next prime is 842203. The reversal of 842191 is 191248.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 842191 - 2³ = 842183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (842111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2455 + ... + 2776.

It is an arithmetic number, because the mean of its divisors is an integer number (125568).

2⁸⁴²¹⁹¹ is an apocalyptic number.

842191 is a deficient number, since it is larger than the sum of its proper divisors (162353).

842191 is a wasteful number, since it uses less digits than its factorization.

842191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5261.

The product of its digits is 576, while the sum is 25.

The square root of 842191 is about 917.7096490721. The cubic root of 842191 is about 94.4358438407.

The spelling of 842191 in words is "eight hundred forty-two thousand, one hundred ninety-one".