42871842 has 40 divisors (see below), whose sum is σ = 103459356. Its totient is φ = 13190688.

The previous prime is 42871823. The next prime is 42871877. The reversal of 42871842 is 24817824.

It can be written as a sum of positive squares in 2 ways, for example, as 41873841 + 998001 = 6471^2 + 999^2 .

It is a junction number, because it is equal to n+sod(n) for n = 42871797 and 42871806.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 8073 + ... + 12284.

Almost surely, 2^42871842 is an apocalyptic number.

42871842 is an abundant number, since it is smaller than the sum of its proper divisors (60587514).

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

42871842 is a wasteful number, since it uses less digits than its factorization.

42871842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20384 (or 20375 counting only the distinct ones).

The product of its digits is 28672, while the sum is 36.

The square root of 42871842 is about 6547.6592764132. The cubic root of 42871842 is about 349.9914065917.

The spelling of 42871842 in words is "forty-two million, eight hundred seventy-one thousand, eight hundred forty-two".