871081 has 4 divisors (see below), whose sum is σ = 872964. Its totient is φ = 869200.

The previous prime is 871061. The next prime is 871103. The reversal of 871081 is 180178.

871081 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 an emirpimes, since its reverse is a distinct semiprime: 180178 = 2 ⋅90089.

It can be written as a sum of positive squares in 2 ways, for example, as 403225 + 467856 = 635^2 + 684^2 .

It is a cyclic number.

It is not a de Polignac number, because 871081 - 2⁷ = 870953 is a prime.

It is a super-2 number, since 2×871081² = 1517564217122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (871001) 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, 291 + ... + 1351.

It is an arithmetic number, because the mean of its divisors is an integer number (218241).

2⁸⁷¹⁰⁸¹ is an apocalyptic number.

It is an amenable number.

871081 is a deficient number, since it is larger than the sum of its proper divisors (1883).

871081 is a wasteful number, since it uses less digits than its factorization.

871081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1882.

The product of its (nonzero) digits is 448, while the sum is 25.

The square root of 871081 is about 933.3172022416. The cubic root of 871081 is about 95.5035496611.

The spelling of 871081 in words is "eight hundred seventy-one thousand, eighty-one".