842189 has 8 divisors (see below), whose sum is σ = 882360. Its totient is φ = 802816.

The previous prime is 842183. The next prime is 842203. The reversal of 842189 is 981248.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 133225 + 708964 = 365^2 + 842^2 .

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 842189 - 2⁴ = 842173 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (842183) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3149 + ... + 3405.

It is an arithmetic number, because the mean of its divisors is an integer number (110295).

2⁸⁴²¹⁸⁹ is an apocalyptic number.

It is an amenable number.

842189 is a deficient number, since it is larger than the sum of its proper divisors (40171).

842189 is a wasteful number, since it uses less digits than its factorization.

842189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399.

The product of its digits is 4608, while the sum is 32.

The square root of 842189 is about 917.7085594022. The cubic root of 842189 is about 94.4357690865.

The spelling of 842189 in words is "eight hundred forty-two thousand, one hundred eighty-nine".