842143572 has 18 divisors (see below), whose sum is σ = 2128751898. Its totient is φ = 280714512.

The previous prime is 842143571. The next prime is 842143573. The reversal of 842143572 is 275341248.

It is a happy number.

842143572 is a `hidden beast` number, since 8 + 42 + 1 + 43 + 572 = 666.

It is an interprime number because it is at equal distance from previous prime (842143571) and next prime (842143573).

It can be written as a sum of positive squares in only one way, i.e., 819447876 + 22695696 = 28626^2 + 4764^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 23392877 = 842143572 / (8 + 4 + 2 + 1 + 4 + 3 + 5 + 7 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (842143571) 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 5 ways as a sum of consecutive naturals, for example, 11696403 + ... + 11696474.

Almost surely, 2^842143572 is an apocalyptic number.

It is an amenable number.

842143572 is an abundant number, since it is smaller than the sum of its proper divisors (1286608326).

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

842143572 is a wasteful number, since it uses less digits than its factorization.

842143572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23392887 (or 23392882 counting only the distinct ones).

The product of its digits is 53760, while the sum is 36.

The square root of 842143572 is about 29019.7100605778. The cubic root of 842143572 is about 944.3407108869.

The spelling of 842143572 in words is "eight hundred forty-two million, one hundred forty-three thousand, five hundred seventy-two".