42161078 has 8 divisors (see below), whose sum is σ = 64132560. Its totient is φ = 20783560.

The previous prime is 42161069. The next prime is 42161081. The reversal of 42161078 is 87016124.

42161078 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 Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 42161078.

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 3 ways as a sum of consecutive naturals, for example, 148313 + ... + 148596.

It is an arithmetic number, because the mean of its divisors is an integer number (8016570).

Almost surely, 2^42161078 is an apocalyptic number.

42161078 is a deficient number, since it is larger than the sum of its proper divisors (21971482).

42161078 is a wasteful number, since it uses less digits than its factorization.

42161078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296982.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 42161078 is about 6493.1562433073. The cubic root of 42161078 is about 348.0464717522.

The spelling of 42161078 in words is "forty-two million, one hundred sixty-one thousand, seventy-eight".