42159686 has 8 divisors (see below), whose sum is σ = 63285624. Its totient is φ = 21064480.

The previous prime is 42159679. The next prime is 42159701. The reversal of 42159686 is 68695124.

It is a happy number.

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

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 3875 + ... + 9966.

It is an arithmetic number, because the mean of its divisors is an integer number (7910703).

Almost surely, 2^42159686 is an apocalyptic number.

42159686 is a deficient number, since it is larger than the sum of its proper divisors (21125938).

42159686 is a wasteful number, since it uses less digits than its factorization.

42159686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15366.

The product of its digits is 103680, while the sum is 41.

The square root of 42159686 is about 6493.0490526408. The cubic root of 42159686 is about 348.0426413156.

The spelling of 42159686 in words is "forty-two million, one hundred fifty-nine thousand, six hundred eighty-six".