842042571 has 4 divisors (see below), whose sum is σ = 1122723432. Its totient is φ = 561361712.

The previous prime is 842042569. The next prime is 842042573. The reversal of 842042571 is 175240248.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (842042569) and next prime (842042573).

It is a cyclic number.

It is not a de Polignac number, because 842042571 - 2¹ = 842042569 is a prime.

It is not an unprimeable number, because it can be changed into a prime (842042573) 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 3 ways as a sum of consecutive naturals, for example, 140340426 + ... + 140340431.

It is an arithmetic number, because the mean of its divisors is an integer number (280680858).

Almost surely, 2^842042571 is an apocalyptic number.

842042571 is a deficient number, since it is larger than the sum of its proper divisors (280680861).

842042571 is a wasteful number, since it uses less digits than its factorization.

842042571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280680860.

The product of its (nonzero) digits is 17920, while the sum is 33.

The square root of 842042571 is about 29017.9697945945. The cubic root of 842042571 is about 944.3029567665.

The spelling of 842042571 in words is "eight hundred forty-two million, forty-two thousand, five hundred seventy-one".