131465 has 4 divisors (see below), whose sum is σ = 157764. Its totient is φ = 105168.

The previous prime is 131449. The next prime is 131477. The reversal of 131465 is 564131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 564131 = 103 ⋅5477.

It can be written as a sum of positive squares in 2 ways, for example, as 100489 + 30976 = 317^2 + 176^2 .

It is a cyclic number.

It is not a de Polignac number, because 131465 - 2⁴ = 131449 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 131465.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 13142 + ... + 13151.

It is an arithmetic number, because the mean of its divisors is an integer number (39441).

2¹³¹⁴⁶⁵ is an apocalyptic number.

It is an amenable number.

131465 is a deficient number, since it is larger than the sum of its proper divisors (26299).

131465 is an equidigital number, since it uses as much as digits as its factorization.

131465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26298.

The product of its digits is 360, while the sum is 20.

The square root of 131465 is about 362.5810254274. The cubic root of 131465 is about 50.8475519364.

Adding to 131465 its reverse (564131), we get a palindrome (695596).

The spelling of 131465 in words is "one hundred thirty-one thousand, four hundred sixty-five".