158501 has 4 divisors (see below), whose sum is σ = 181152. Its totient is φ = 135852.

The previous prime is 158489. The next prime is 158507. The reversal of 158501 is 105851.

158501 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 105851 = 151 ⋅701.

It is a cyclic number.

It is not a de Polignac number, because 158501 - 2¹⁰ = 157477 is a prime.

It is a Duffinian number.

It is a Curzon number.

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 158501.

It is not an unprimeable number, because it can be changed into a prime (158507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11315 + ... + 11328.

It is an arithmetic number, because the mean of its divisors is an integer number (45288).

2¹⁵⁸⁵⁰¹ is an apocalyptic number.

It is an amenable number.

158501 is a deficient number, since it is larger than the sum of its proper divisors (22651).

158501 is an equidigital number, since it uses as much as digits as its factorization.

158501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22650.

The product of its (nonzero) digits is 200, while the sum is 20.

The square root of 158501 is about 398.1218406468. The cubic root of 158501 is about 54.1182821055.

Subtracting from 158501 its reverse (105851), we obtain a triangular number (52650 = T₃₂₄).

It can be divided in two parts, 15850 and 1, that added together give a palindrome (15851).

The spelling of 158501 in words is "one hundred fifty-eight thousand, five hundred one".