42339871 has 6 divisors (see below), whose sum is σ = 49252560. Its totient is φ = 36291276.

The previous prime is 42339863. The next prime is 42339889. The reversal of 42339871 is 17893324.

It is not a de Polignac number, because 42339871 - 2³ = 42339863 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42339871.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42339811) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 431991 + ... + 432088.

It is an arithmetic number, because the mean of its divisors is an integer number (8208760).

Almost surely, 2^42339871 is an apocalyptic number.

42339871 is a deficient number, since it is larger than the sum of its proper divisors (6912689).

42339871 is an equidigital number, since it uses as much as digits as its factorization.

42339871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 864093 (or 864086 counting only the distinct ones).

The product of its digits is 36288, while the sum is 37.

The square root of 42339871 is about 6506.9094814666. The cubic root of 42339871 is about 348.5377662381.

The spelling of 42339871 in words is "forty-two million, three hundred thirty-nine thousand, eight hundred seventy-one".