871205 has 4 divisors (see below), whose sum is σ = 1045452. Its totient is φ = 696960.

The previous prime is 871181. The next prime is 871229. The reversal of 871205 is 502178.

871205 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.

It is an interprime number because it is at equal distance from previous prime (871181) and next prime (871229).

It can be written as a sum of positive squares in 2 ways, for example, as 494209 + 376996 = 703^2 + 614^2 .

It is a de Polignac number, because none of the positive numbers 2^k-871205 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87116 + ... + 87125.

It is an arithmetic number, because the mean of its divisors is an integer number (261363).

2⁸⁷¹²⁰⁵ is an apocalyptic number.

It is an amenable number.

871205 is a deficient number, since it is larger than the sum of its proper divisors (174247).

871205 is a wasteful number, since it uses less digits than its factorization.

871205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174246.

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 871205 is about 933.3836295972. The cubic root of 871205 is about 95.5080811487.

It can be divided in two parts, 87120 and 5, that multiplied together give a square (435600 = 660²).

The spelling of 871205 in words is "eight hundred seventy-one thousand, two hundred five".