871261 has 4 divisors (see below), whose sum is σ = 875392. Its totient is φ = 867132.

The previous prime is 871259. The next prime is 871271. The reversal of 871261 is 162178.

871261 is an esthetic number in base 11, because in such base its adjacent digits differ by 1.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 871261 - 2¹ = 871259 is a prime.

It is a Duffinian number.

871261 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (871231) 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, 1731 + ... + 2176.

It is an arithmetic number, because the mean of its divisors is an integer number (218848).

2⁸⁷¹²⁶¹ is an apocalyptic number.

It is an amenable number.

871261 is a deficient number, since it is larger than the sum of its proper divisors (4131).

871261 is a wasteful number, since it uses less digits than its factorization.

871261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4130.

The product of its digits is 672, while the sum is 25.

The square root of 871261 is about 933.4136274985. The cubic root of 871261 is about 95.5101274860.

The spelling of 871261 in words is "eight hundred seventy-one thousand, two hundred sixty-one".