42578163 has 16 divisors (see below), whose sum is σ = 63365760. Its totient is φ = 28256328.

The previous prime is 42578143. The next prime is 42578167. The reversal of 42578163 is 36187524.

42578163 is a `hidden beast` number, since 425 + 78 + 163 = 666.

42578163 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-42578163 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42578167) 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 15 ways as a sum of consecutive naturals, for example, 2656 + ... + 9602.

It is an arithmetic number, because the mean of its divisors is an integer number (3960360).

Almost surely, 2^42578163 is an apocalyptic number.

42578163 is a deficient number, since it is larger than the sum of its proper divisors (20787597).

42578163 is a wasteful number, since it uses less digits than its factorization.

42578163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7183 (or 7177 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 42578163 is about 6525.1944798604. The cubic root of 42578163 is about 349.1904090374.

The spelling of 42578163 in words is "forty-two million, five hundred seventy-eight thousand, one hundred sixty-three".