42184685 has 4 divisors (see below), whose sum is σ = 50621628. Its totient is φ = 33747744.

The previous prime is 42184663. The next prime is 42184697. The reversal of 42184685 is 58648124.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 33028009 + 9156676 = 5747^2 + 3026^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42184685 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4218464 + ... + 4218473.

It is an arithmetic number, because the mean of its divisors is an integer number (12655407).

Almost surely, 2^42184685 is an apocalyptic number.

It is an amenable number.

42184685 is a deficient number, since it is larger than the sum of its proper divisors (8436943).

42184685 is an equidigital number, since it uses as much as digits as its factorization.

42184685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8436942.

The product of its digits is 61440, while the sum is 38.

The square root of 42184685 is about 6494.9738259673. The cubic root of 42184685 is about 348.1114194909. Note that the first 3 decimals are identical.

The spelling of 42184685 in words is "forty-two million, one hundred eighty-four thousand, six hundred eighty-five".