42055589 has 4 divisors (see below), whose sum is σ = 42069024. Its totient is φ = 42042156.

The previous prime is 42055583. The next prime is 42055649. The reversal of 42055589 is 98555024.

42055589 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 42055589 - 2²⁰ = 41007013 is a prime.

It is a super-2 number, since 2×42055589² = 3537345132273842, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42055583) 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 3 ways as a sum of consecutive naturals, for example, 734 + ... + 9200.

It is an arithmetic number, because the mean of its divisors is an integer number (10517256).

Almost surely, 2^42055589 is an apocalyptic number.

It is an amenable number.

42055589 is a deficient number, since it is larger than the sum of its proper divisors (13435).

42055589 is an equidigital number, since it uses as much as digits as its factorization.

42055589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13434.

The product of its (nonzero) digits is 72000, while the sum is 38.

The square root of 42055589 is about 6485.0280647041. The cubic root of 42055589 is about 347.7559531066.

The spelling of 42055589 in words is "forty-two million, fifty-five thousand, five hundred eighty-nine".