134581 has 2 divisors, whose sum is σ = 134582. Its totient is φ = 134580.

The previous prime is 134513. The next prime is 134587. The reversal of 134581 is 185431.

134581 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 133956 + 625 = 366^2 + 25^2 .

It is a cyclic number.

It is not a de Polignac number, because 134581 - 2¹¹ = 132533 is a prime.

It is a super-2 number, since 2×134581² = 36224091122, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (134587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67290 + 67291.

It is an arithmetic number, because the mean of its divisors is an integer number (67291).

2¹³⁴⁵⁸¹ is an apocalyptic number.

It is an amenable number.

134581 is a deficient number, since it is larger than the sum of its proper divisors (1).

134581 is an equidigital number, since it uses as much as digits as its factorization.

134581 is an odious number, because the sum of its binary digits is odd.

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

The square root of 134581 is about 366.8528315278. The cubic root of 134581 is about 51.2461508114.

The spelling of 134581 in words is "one hundred thirty-four thousand, five hundred eighty-one".