158686 has 8 divisors (see below), whose sum is σ = 259704. Its totient is φ = 72120.

The previous prime is 158663. The next prime is 158699. The reversal of 158686 is 686851.

It is a happy number.

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

It is an Ulam number.

It is a plaindrome in base 16.

It is a congruent number.

It is an unprimeable number.

158686 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3585 + ... + 3628.

It is an arithmetic number, because the mean of its divisors is an integer number (32463).

2¹⁵⁸⁶⁸⁶ is an apocalyptic number.

158686 is a deficient number, since it is larger than the sum of its proper divisors (101018).

158686 is a wasteful number, since it uses less digits than its factorization.

158686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7226.

The product of its digits is 11520, while the sum is 34.

The square root of 158686 is about 398.3541138234. The cubic root of 158686 is about 54.1393292692.

The spelling of 158686 in words is "one hundred fifty-eight thousand, six hundred eighty-six".