135520525 has 18 divisors (see below), whose sum is σ = 195483210. Its totient is φ = 92927520.

The previous prime is 135520519. The next prime is 135520571. The reversal of 135520525 is 525025531.

It can be written as a sum of positive squares in 3 ways, for example, as 170569 + 135349956 = 413^2 + 11634^2 .

It is not a de Polignac number, because 135520525 - 2⁷ = 135520397 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 135520493 and 135520502.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 54090 + ... + 56539.

Almost surely, 2^135520525 is an apocalyptic number.

It is an amenable number.

135520525 is a deficient number, since it is larger than the sum of its proper divisors (59962685).

135520525 is a wasteful number, since it uses less digits than its factorization.

135520525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110653 (or 110641 counting only the distinct ones).

The product of its (nonzero) digits is 7500, while the sum is 28.

The square root of 135520525 is about 11641.3283176792. The cubic root of 135520525 is about 513.6512608138.

The spelling of 135520525 in words is "one hundred thirty-five million, five hundred twenty thousand, five hundred twenty-five".