131965 has 4 divisors (see below), whose sum is σ = 158364. Its totient is φ = 105568.

The previous prime is 131959. The next prime is 131969. The reversal of 131965 is 569131.

131965 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 569131 = 83 ⋅6857.

It can be written as a sum of positive squares in 2 ways, for example, as 52441 + 79524 = 229^2 + 282^2 .

It is a cyclic number.

It is not a de Polignac number, because 131965 - 2⁵ = 131933 is a prime.

It is a super-2 number, since 2×131965² = 34829522450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131969) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13192 + ... + 13201.

It is an arithmetic number, because the mean of its divisors is an integer number (39591).

2¹³¹⁹⁶⁵ is an apocalyptic number.

It is an amenable number.

131965 is a deficient number, since it is larger than the sum of its proper divisors (26399).

131965 is an equidigital number, since it uses as much as digits as its factorization.

131965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26398.

The product of its digits is 810, while the sum is 25.

The square root of 131965 is about 363.2698721337. The cubic root of 131965 is about 50.9119331089.

The spelling of 131965 in words is "one hundred thirty-one thousand, nine hundred sixty-five".