131586 has 32 divisors (see below), whose sum is σ = 325248.
Its totient is φ = 34560.
The previous prime is 131581. The next prime is 131591. The reversal of 131586 is 685131.
It can be divided in two parts, 131 and 586, that added together give a palindrome (717).
131586 is nontrivially palindromic in base 4 and base 16.
It is an interprime number because it is at equal distance from previous prime (131581) and next prime (131591).
131586 is an undulating number in base 16.
It is not an unprimeable number, because it can be changed into a prime (131581) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (3) of ones.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 426 + ... + 666.
It is an arithmetic number, because the mean of its divisors is an integer number (10164).
2131586 is an apocalyptic number.
It is a practical number, because each smaller number is the sum of distinct divisors of 131586, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (162624).
131586 is an abundant number, since it is smaller than the sum of its proper divisors (193662).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
131586 is a wasteful number, since it uses less digits than its factorization.
131586 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 266.
The product of its digits is 720, while the sum is 24.
The square root of 131586 is about 362.7478463065.
The cubic root of 131586 is about 50.8631471320.
The spelling of 131586 in words is "one hundred thirty-one thousand, five hundred eighty-six".