131485 has 4 divisors (see below), whose sum is σ = 157788. Its totient is φ = 105184.

The previous prime is 131479. The next prime is 131489. The reversal of 131485 is 584131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 54756 + 76729 = 234^2 + 277^2 .

It is a cyclic number.

It is not a de Polignac number, because 131485 - 2³ = 131477 is a prime.

It is a Duffinian number.

131485 is a lucky number.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131489) 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 3 ways as a sum of consecutive naturals, for example, 13144 + ... + 13153.

It is an arithmetic number, because the mean of its divisors is an integer number (39447).

2¹³¹⁴⁸⁵ is an apocalyptic number.

It is an amenable number.

131485 is a deficient number, since it is larger than the sum of its proper divisors (26303).

131485 is an equidigital number, since it uses as much as digits as its factorization.

131485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26302.

The product of its digits is 480, while the sum is 22.

The square root of 131485 is about 362.6086044208. The cubic root of 131485 is about 50.8501303146.

It can be divided in two parts, 131 and 485, that added together give a palindrome (616).

The spelling of 131485 in words is "one hundred thirty-one thousand, four hundred eighty-five".