42871191 has 32 divisors (see below), whose sum is σ = 64475136. Its totient is φ = 25116000.

The previous prime is 42871177. The next prime is 42871247. The reversal of 42871191 is 19117824.

42871191 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 42871191 - 2⁵ = 42871159 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42871121) 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, 203076 + ... + 203286.

It is an arithmetic number, because the mean of its divisors is an integer number (2014848).

Almost surely, 2^42871191 is an apocalyptic number.

42871191 is a deficient number, since it is larger than the sum of its proper divisors (21603945).

42871191 is a wasteful number, since it uses less digits than its factorization.

42871191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403.

The product of its digits is 4032, while the sum is 33.

The square root of 42871191 is about 6547.6095638027. The cubic root of 42871191 is about 349.9896350672.

The spelling of 42871191 in words is "forty-two million, eight hundred seventy-one thousand, one hundred ninety-one".