131706 has 24 divisors (see below), whose sum is σ = 297024. Its totient is φ = 43740.

The previous prime is 131701. The next prime is 131707. The reversal of 131706 is 607131.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (131701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 351 + ... + 621.

It is an arithmetic number, because the mean of its divisors is an integer number (12376).

2¹³¹⁷⁰⁶ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131706, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (148512).

131706 is an abundant number, since it is smaller than the sum of its proper divisors (165318).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131706 is an equidigital number, since it uses as much as digits as its factorization.

131706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288 (or 276 counting only the distinct ones).

The product of its (nonzero) digits is 126, while the sum is 18.

The square root of 131706 is about 362.9132127658. The cubic root of 131706 is about 50.8786040023.

Adding to 131706 its reverse (607131), we get a palindrome (738837).

The spelling of 131706 in words is "one hundred thirty-one thousand, seven hundred six".