42871605 has 32 divisors (see below), whose sum is σ = 80928768. Its totient is φ = 18964800.

The previous prime is 42871601. The next prime is 42871663. The reversal of 42871605 is 50617824.

42871605 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42871605 - 2² = 42871601 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42871601) 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 31 ways as a sum of consecutive naturals, for example, 3331 + ... + 9840.

It is an arithmetic number, because the mean of its divisors is an integer number (2529024).

Almost surely, 2^42871605 is an apocalyptic number.

It is an amenable number.

42871605 is a deficient number, since it is larger than the sum of its proper divisors (38057163).

42871605 is a wasteful number, since it uses less digits than its factorization.

42871605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13217.

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 42871605 is about 6547.6411783176. The cubic root of 42871605 is about 349.9907616609.

The spelling of 42871605 in words is "forty-two million, eight hundred seventy-one thousand, six hundred five".