131845 has 8 divisors (see below), whose sum is σ = 180864. Its totient is φ = 90384.

The previous prime is 131839. The next prime is 131849. The reversal of 131845 is 548131.

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

It is not a de Polignac number, because 131845 - 2³ = 131837 is a prime.

It is a Duffinian number.

131845 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1849 + ... + 1918.

It is an arithmetic number, because the mean of its divisors is an integer number (22608).

2¹³¹⁸⁴⁵ is an apocalyptic number.

It is an amenable number.

131845 is a deficient number, since it is larger than the sum of its proper divisors (49019).

131845 is an equidigital number, since it uses as much as digits as its factorization.

131845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3779.

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

The square root of 131845 is about 363.1046681055. The cubic root of 131845 is about 50.8964964787.

Adding to 131845 its reverse (548131), we get a palindrome (679976).

The spelling of 131845 in words is "one hundred thirty-one thousand, eight hundred forty-five".