42005587 has 8 divisors (see below), whose sum is σ = 45857504. Its totient is φ = 38242368.

The previous prime is 42005569. The next prime is 42005591. The reversal of 42005587 is 78550024.

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

It is a cyclic number.

It is not a de Polignac number, because 42005587 - 2⁷ = 42005459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42003587) by changing a digit.

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, 21183 + ... + 23080.

It is an arithmetic number, because the mean of its divisors is an integer number (5732188).

Almost surely, 2^42005587 is an apocalyptic number.

42005587 is a deficient number, since it is larger than the sum of its proper divisors (3851917).

42005587 is a wasteful number, since it uses less digits than its factorization.

42005587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44349.

The product of its (nonzero) digits is 11200, while the sum is 31.

The square root of 42005587 is about 6481.1717304821. The cubic root of 42005587 is about 347.6180769488.

The spelling of 42005587 in words is "forty-two million, five thousand, five hundred eighty-seven".