842243591 has 4 divisors (see below), whose sum is σ = 962564112. Its totient is φ = 721923072.

The previous prime is 842243551. The next prime is 842243593. The reversal of 842243591 is 195342248.

842243591 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.

It is a cyclic number.

It is not a de Polignac number, because 842243591 - 2¹⁰ = 842242567 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 (842243593) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60160250 + ... + 60160263.

It is an arithmetic number, because the mean of its divisors is an integer number (240641028).

Almost surely, 2^842243591 is an apocalyptic number.

842243591 is a deficient number, since it is larger than the sum of its proper divisors (120320521).

842243591 is a wasteful number, since it uses less digits than its factorization.

842243591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120320520.

The product of its digits is 69120, while the sum is 38.

The square root of 842243591 is about 29021.4333036809. The cubic root of 842243591 is about 944.3780949616.

The spelling of 842243591 in words is "eight hundred forty-two million, two hundred forty-three thousand, five hundred ninety-one".