131085 has 16 divisors (see below), whose sum is σ = 233280. Its totient is φ = 69840.

The previous prime is 131071. The next prime is 131101. The reversal of 131085 is 580131.

It is a happy number.

It is not a de Polignac number, because 131085 - 2⁷ = 130957 is a prime.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 351 + ... + 620.

It is an arithmetic number, because the mean of its divisors is an integer number (14580).

2¹³¹⁰⁸⁵ is an apocalyptic number.

131085 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

131085 is a deficient number, since it is larger than the sum of its proper divisors (102195).

131085 is an equidigital number, since it uses as much as digits as its factorization.

131085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 985 (or 979 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 131085 is about 362.0566254055. The cubic root of 131085 is about 50.7985129868.

The spelling of 131085 in words is "one hundred thirty-one thousand, eighty-five".