571239942 has 72 divisors (see below), whose sum is σ = 1439227656. Its totient is φ = 150643584.

The previous prime is 571239931. The next prime is 571239961. The reversal of 571239942 is 249932175.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 571239894 and 571239903.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 43938 + ... + 55434.

It is an arithmetic number, because the mean of its divisors is an integer number (19989273).

Almost surely, 2^571239942 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 571239942, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (719613828).

571239942 is an abundant number, since it is smaller than the sum of its proper divisors (867987714).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

571239942 is a wasteful number, since it uses less digits than its factorization.

571239942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11542 (or 11522 counting only the distinct ones).

The product of its digits is 136080, while the sum is 42.

The square root of 571239942 is about 23900.6263934651. The cubic root of 571239942 is about 829.7352143229.

It can be divided in two parts, 5712 and 39942, that added together give a palindrome (45654).

The spelling of 571239942 in words is "five hundred seventy-one million, two hundred thirty-nine thousand, nine hundred forty-two".