135230521 has 2 divisors, whose sum is σ = 135230522. Its totient is φ = 135230520.

The previous prime is 135230503. The next prime is 135230527. The reversal of 135230521 is 125032531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75012921 + 60217600 = 8661^2 + 7760^2 .

It is a cyclic number.

It is not a de Polignac number, because 135230521 - 2⁹ = 135230009 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 135230492 and 135230501.

It is not a weakly prime, because it can be changed into another prime (135230527) 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, 67615260 + 67615261.

It is an arithmetic number, because the mean of its divisors is an integer number (67615261).

Almost surely, 2^135230521 is an apocalyptic number.

It is an amenable number.

135230521 is a deficient number, since it is larger than the sum of its proper divisors (1).

135230521 is an equidigital number, since it uses as much as digits as its factorization.

135230521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 135230521 is about 11628.8658518361. The cubic root of 135230521 is about 513.2846071233.

The spelling of 135230521 in words is "one hundred thirty-five million, two hundred thirty thousand, five hundred twenty-one".