134681 has 2 divisors, whose sum is σ = 134682. Its totient is φ = 134680.

The previous prime is 134677. The next prime is 134683. The reversal of 134681 is 186431.

134681 = 259² + 260².

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67600 + 67081 = 260^2 + 259^2 .

It is a cyclic number.

It is not a de Polignac number, because 134681 - 2² = 134677 is a prime.

It is a super-2 number, since 2×134681² = 36277943522, which contains 22 as substring.

Together with 134683, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (134683) 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 as a sum of consecutive naturals, namely, 67340 + 67341.

It is an arithmetic number, because the mean of its divisors is an integer number (67341).

2¹³⁴⁶⁸¹ is an apocalyptic number.

134681 is the 260-th centered square number.

It is an amenable number.

134681 is a deficient number, since it is larger than the sum of its proper divisors (1).

134681 is an equidigital number, since it uses as much as digits as its factorization.

134681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 576, while the sum is 23.

The square root of 134681 is about 366.9891006556. The cubic root of 134681 is about 51.2588404341.

The spelling of 134681 in words is "one hundred thirty-four thousand, six hundred eighty-one".