42173871 has 16 divisors (see below), whose sum is σ = 57926400. Its totient is φ = 27276480.

The previous prime is 42173861. The next prime is 42173893. The reversal of 42173871 is 17837124.

It is a happy number.

42173871 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 42173871 - 2⁹ = 42173359 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42173861) 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 15 ways as a sum of consecutive naturals, for example, 23616 + ... + 25338.

It is an arithmetic number, because the mean of its divisors is an integer number (3620400).

Almost surely, 2^42173871 is an apocalyptic number.

42173871 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

42173871 is a deficient number, since it is larger than the sum of its proper divisors (15752529).

42173871 is a wasteful number, since it uses less digits than its factorization.

42173871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1966.

The product of its digits is 9408, while the sum is 33.

The square root of 42173871 is about 6494.1412827255. The cubic root of 42173871 is about 348.0816709490.

The spelling of 42173871 in words is "forty-two million, one hundred seventy-three thousand, eight hundred seventy-one".