158503 has 4 divisors (see below), whose sum is σ = 163648. Its totient is φ = 153360.

The previous prime is 158489. The next prime is 158507. The reversal of 158503 is 305851.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 158503 - 2⁹ = 157991 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 2526 + ... + 2587.

It is an arithmetic number, because the mean of its divisors is an integer number (40912).

2¹⁵⁸⁵⁰³ is an apocalyptic number.

158503 is a deficient number, since it is larger than the sum of its proper divisors (5145).

158503 is an equidigital number, since it uses as much as digits as its factorization.

158503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5144.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 158503 is about 398.1243524328. The cubic root of 158503 is about 54.1185097299.

The spelling of 158503 in words is "one hundred fifty-eight thousand, five hundred three".