42511685 has 8 divisors (see below), whose sum is σ = 51134976. Its totient is φ = 33928720.

The previous prime is 42511673. The next prime is 42511699. The reversal of 42511685 is 58611524.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42511685 - 2¹⁶ = 42446149 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7709 + ... + 12018.

It is an arithmetic number, because the mean of its divisors is an integer number (6391872).

Almost surely, 2^42511685 is an apocalyptic number.

It is an amenable number.

42511685 is a deficient number, since it is larger than the sum of its proper divisors (8623291).

42511685 is a wasteful number, since it uses less digits than its factorization.

42511685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20163.

The product of its digits is 9600, while the sum is 32.

The square root of 42511685 is about 6520.0985422001. The cubic root of 42511685 is about 349.0085820940.

The spelling of 42511685 in words is "forty-two million, five hundred eleven thousand, six hundred eighty-five".