159603 has 4 divisors (see below), whose sum is σ = 212808. Its totient is φ = 106400.

The previous prime is 159589. The next prime is 159617. The reversal of 159603 is 306951.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 306951 = 3 ⋅102317.

It is an interprime number because it is at equal distance from previous prime (159589) and next prime (159617).

It is a cyclic number.

It is not a de Polignac number, because 159603 - 2⁵ = 159571 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (159623) 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, 26598 + ... + 26603.

It is an arithmetic number, because the mean of its divisors is an integer number (53202).

2¹⁵⁹⁶⁰³ is an apocalyptic number.

159603 is a deficient number, since it is larger than the sum of its proper divisors (53205).

159603 is an equidigital number, since it uses as much as digits as its factorization.

159603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53204.

The product of its (nonzero) digits is 810, while the sum is 24.

The square root of 159603 is about 399.5034417874. The cubic root of 159603 is about 54.2434141524.

The spelling of 159603 in words is "one hundred fifty-nine thousand, six hundred three".