42173985 has 32 divisors (see below), whose sum is σ = 78001920. Its totient is φ = 19058688.

The previous prime is 42173959. The next prime is 42174007. The reversal of 42173985 is 58937124.

It is not a de Polignac number, because 42173985 - 2⁶ = 42173921 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7089 + ... + 11601.

It is an arithmetic number, because the mean of its divisors is an integer number (2437560).

Almost surely, 2^42173985 is an apocalyptic number.

It is an amenable number.

42173985 is a deficient number, since it is larger than the sum of its proper divisors (35827935).

42173985 is a wasteful number, since it uses less digits than its factorization.

42173985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4617.

The product of its digits is 60480, while the sum is 39.

The square root of 42173985 is about 6494.1500598616. The cubic root of 42173985 is about 348.0819845814.

The spelling of 42173985 in words is "forty-two million, one hundred seventy-three thousand, nine hundred eighty-five".