42785187 has 8 divisors (see below), whose sum is σ = 57299136. Its totient is φ = 28397352.

The previous prime is 42785161. The next prime is 42785189. The reversal of 42785187 is 78158724.

42785187 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 42785187 - 2⁶ = 42785123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42785189) 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 7 ways as a sum of consecutive naturals, for example, 30733 + ... + 32094.

It is an arithmetic number, because the mean of its divisors is an integer number (7162392).

Almost surely, 2^42785187 is an apocalyptic number.

42785187 is a deficient number, since it is larger than the sum of its proper divisors (14513949).

42785187 is a wasteful number, since it uses less digits than its factorization.

42785187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63057.

The product of its digits is 125440, while the sum is 42.

The square root of 42785187 is about 6541.0386789867. The cubic root of 42785187 is about 349.7554400397.

The spelling of 42785187 in words is "forty-two million, seven hundred eighty-five thousand, one hundred eighty-seven".