871603 has 4 divisors (see below), whose sum is σ = 884680. Its totient is φ = 858528.

The previous prime is 871597. The next prime is 871613. The reversal of 871603 is 306178.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 306178 = 2 ⋅153089.

It is a cyclic number.

It is not a de Polignac number, because 871603 - 2⁵ = 871571 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (871613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6438 + ... + 6571.

It is an arithmetic number, because the mean of its divisors is an integer number (221170).

2⁸⁷¹⁶⁰³ is an apocalyptic number.

871603 is a deficient number, since it is larger than the sum of its proper divisors (13077).

871603 is a wasteful number, since it uses less digits than its factorization.

871603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13076.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 871603 is about 933.5968080494. The cubic root of 871603 is about 95.5226228579.

The spelling of 871603 in words is "eight hundred seventy-one thousand, six hundred three".