131871 has 8 divisors (see below), whose sum is σ = 177840. Its totient is φ = 86912.

The previous prime is 131861. The next prime is 131891. The reversal of 131871 is 178131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 131871 - 2⁵ = 131839 is a prime.

131871 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145 + ... + 533.

It is an arithmetic number, because the mean of its divisors is an integer number (22230).

2¹³¹⁸⁷¹ is an apocalyptic number.

131871 is a deficient number, since it is larger than the sum of its proper divisors (45969).

131871 is a wasteful number, since it uses less digits than its factorization.

131871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505.

The product of its digits is 168, while the sum is 21.

The square root of 131871 is about 363.1404686895. The cubic root of 131871 is about 50.8998418765.

The spelling of 131871 in words is "one hundred thirty-one thousand, eight hundred seventy-one".