42078171 has 8 divisors (see below), whose sum is σ = 56140560. Its totient is φ = 28033952.

The previous prime is 42078167. The next prime is 42078173. The reversal of 42078171 is 17187024.

42078171 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 a cyclic number.

It is not a de Polignac number, because 42078171 - 2² = 42078167 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42078173) 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, 2365 + ... + 9473.

It is an arithmetic number, because the mean of its divisors is an integer number (7017570).

Almost surely, 2^42078171 is an apocalyptic number.

42078171 is a deficient number, since it is larger than the sum of its proper divisors (14062389).

42078171 is a wasteful number, since it uses less digits than its factorization.

42078171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9085.

The product of its (nonzero) digits is 3136, while the sum is 30.

The square root of 42078171 is about 6486.7689183445. The cubic root of 42078171 is about 347.8181851821.

The spelling of 42078171 in words is "forty-two million, seventy-eight thousand, one hundred seventy-one".