135020525 has 6 divisors (see below), whose sum is σ = 167425482. Its totient is φ = 108016400.

The previous prime is 135020513. The next prime is 135020539. The reversal of 135020525 is 525020531.

It can be written as a sum of positive squares in 3 ways, for example, as 36990724 + 98029801 = 6082^2 + 9901^2 .

It is not a de Polignac number, because 135020525 - 2⁸ = 135020269 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 135020525.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2700386 + ... + 2700435.

It is an arithmetic number, because the mean of its divisors is an integer number (27904247).

Almost surely, 2^135020525 is an apocalyptic number.

It is an amenable number.

135020525 is a deficient number, since it is larger than the sum of its proper divisors (32404957).

135020525 is an equidigital number, since it uses as much as digits as its factorization.

135020525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5400831 (or 5400826 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 135020525 is about 11619.8332604216. The cubic root of 135020525 is about 513.0187806532.

The spelling of 135020525 in words is "one hundred thirty-five million, twenty thousand, five hundred twenty-five".