134660261 has 2 divisors, whose sum is σ = 134660262. Its totient is φ = 134660260.

The previous prime is 134660257. The next prime is 134660263. The reversal of 134660261 is 162066431.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 107516161 + 27144100 = 10369^2 + 5210^2 .

It is a cyclic number.

It is not a de Polignac number, because 134660261 - 2² = 134660257 is a prime.

Together with 134660263, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (134660263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67330130 + 67330131.

It is an arithmetic number, because the mean of its divisors is an integer number (67330131).

Almost surely, 2^134660261 is an apocalyptic number.

It is an amenable number.

134660261 is a deficient number, since it is larger than the sum of its proper divisors (1).

134660261 is an equidigital number, since it uses as much as digits as its factorization.

134660261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 134660261 is about 11604.3207901195. The cubic root of 134660261 is about 512.5620924966.

The spelling of 134660261 in words is "one hundred thirty-four million, six hundred sixty thousand, two hundred sixty-one".