135525609 has 16 divisors (see below), whose sum is σ = 201570240. Its totient is φ = 89994240.

The previous prime is 135525571. The next prime is 135525619. The reversal of 135525609 is 906525531.

135525609 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 135525609 - 2²³ = 127137001 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (135525619) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2827 + ... + 16704.

It is an arithmetic number, because the mean of its divisors is an integer number (12598140).

Almost surely, 2^135525609 is an apocalyptic number.

It is an amenable number.

135525609 is a deficient number, since it is larger than the sum of its proper divisors (66044631).

135525609 is a wasteful number, since it uses less digits than its factorization.

135525609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19797 (or 19791 counting only the distinct ones).

The product of its (nonzero) digits is 40500, while the sum is 36.

The square root of 135525609 is about 11641.5466755926. The cubic root of 135525609 is about 513.6576838762.

The spelling of 135525609 in words is "one hundred thirty-five million, five hundred twenty-five thousand, six hundred nine".