42017887 has 4 divisors (see below), whose sum is σ = 42115360. Its totient is φ = 41920416.

The previous prime is 42017867. The next prime is 42017909. The reversal of 42017887 is 78871024.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42017887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42017827) 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 3 ways as a sum of consecutive naturals, for example, 48087 + ... + 48952.

It is an arithmetic number, because the mean of its divisors is an integer number (10528840).

Almost surely, 2^42017887 is an apocalyptic number.

42017887 is a deficient number, since it is larger than the sum of its proper divisors (97473).

42017887 is an equidigital number, since it uses as much as digits as its factorization.

42017887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97472.

The product of its (nonzero) digits is 25088, while the sum is 37.

The square root of 42017887 is about 6482.1205635193. The cubic root of 42017887 is about 347.6520032698.

The spelling of 42017887 in words is "forty-two million, seventeen thousand, eight hundred eighty-seven".