135660541 has 2 divisors, whose sum is σ = 135660542. Its totient is φ = 135660540.

The previous prime is 135660533. The next prime is 135660559. The reversal of 135660541 is 145066531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 108056025 + 27604516 = 10395^2 + 5254^2 .

It is a cyclic number.

It is not a de Polignac number, because 135660541 - 2³ = 135660533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135661541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67830270 + 67830271.

It is an arithmetic number, because the mean of its divisors is an integer number (67830271).

Almost surely, 2^135660541 is an apocalyptic number.

It is an amenable number.

135660541 is a deficient number, since it is larger than the sum of its proper divisors (1).

135660541 is an equidigital number, since it uses as much as digits as its factorization.

135660541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 135660541 is about 11647.3405118937. The cubic root of 135660541 is about 513.8280966123.

The spelling of 135660541 in words is "one hundred thirty-five million, six hundred sixty thousand, five hundred forty-one".