42158705 has 8 divisors (see below), whose sum is σ = 51767232. Its totient is φ = 32942448.

The previous prime is 42158687. The next prime is 42158717. The reversal of 42158705 is 50785124.

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 42158705 - 2¹⁰ = 42157681 is a prime.

It is a super-3 number, since 3×42158705³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97829 + ... + 98258.

It is an arithmetic number, because the mean of its divisors is an integer number (6470904).

Almost surely, 2^42158705 is an apocalyptic number.

It is an amenable number.

42158705 is a deficient number, since it is larger than the sum of its proper divisors (9608527).

42158705 is a wasteful number, since it uses less digits than its factorization.

42158705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196135.

The product of its (nonzero) digits is 11200, while the sum is 32.

The square root of 42158705 is about 6492.9735098797. The cubic root of 42158705 is about 348.0399417977.

The spelling of 42158705 in words is "forty-two million, one hundred fifty-eight thousand, seven hundred five".