158687 has 4 divisors (see below), whose sum is σ = 160560. Its totient is φ = 156816.

The previous prime is 158663. The next prime is 158699. The reversal of 158687 is 786851.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 786851 = 13 ⋅60527.

It is a cyclic number.

It is not a de Polignac number, because 158687 - 2¹² = 154591 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12 and base 16.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 158687.

It is not an unprimeable number, because it can be changed into a prime (158617) 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 3 ways as a sum of consecutive naturals, for example, 803 + ... + 980.

It is an arithmetic number, because the mean of its divisors is an integer number (40140).

2¹⁵⁸⁶⁸⁷ is an apocalyptic number.

158687 is a deficient number, since it is larger than the sum of its proper divisors (1873).

158687 is an equidigital number, since it uses as much as digits as its factorization.

158687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1872.

The product of its digits is 13440, while the sum is 35.

The square root of 158687 is about 398.3553689860. The cubic root of 158687 is about 54.1394429932.

It can be divided in two parts, 15 and 8687, that multiplied together give a triangular number (130305 = T₅₁₀).

The spelling of 158687 in words is "one hundred fifty-eight thousand, six hundred eighty-seven".