42187158 has 24 divisors (see below), whose sum is σ = 98437248. Its totient is φ = 12980592.

The previous prime is 42187139. The next prime is 42187177. The reversal of 42187158 is 85178124.

42187158 is a `hidden beast` number, since 421 + 87 + 158 = 666.

42187158 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (42187139) and next prime (42187177).

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 (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 89910 + ... + 90377.

It is an arithmetic number, because the mean of its divisors is an integer number (4101552).

Almost surely, 2^42187158 is an apocalyptic number.

42187158 is an abundant number, since it is smaller than the sum of its proper divisors (56250090).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42187158 is a wasteful number, since it uses less digits than its factorization.

42187158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180308 (or 180305 counting only the distinct ones).

The product of its digits is 17920, while the sum is 36.

The square root of 42187158 is about 6495.1642011577. The cubic root of 42187158 is about 348.1182218231.

Adding to 42187158 its product of digits (17920), we get a triangular number (42205078 = T₉₁₈₇).

The spelling of 42187158 in words is "forty-two million, one hundred eighty-seven thousand, one hundred fifty-eight".