135539975 has 6 divisors (see below), whose sum is σ = 168069600. Its totient is φ = 108431960.

The previous prime is 135539959. The next prime is 135539981. The reversal of 135539975 is 579935531.

It is not a de Polignac number, because 135539975 - 2⁴ = 135539959 is a prime.

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, 2710775 + ... + 2710824.

It is an arithmetic number, because the mean of its divisors is an integer number (28011600).

Almost surely, 2^135539975 is an apocalyptic number.

135539975 is a deficient number, since it is larger than the sum of its proper divisors (32529625).

135539975 is an equidigital number, since it uses as much as digits as its factorization.

135539975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5421609 (or 5421604 counting only the distinct ones).

The product of its digits is 637875, while the sum is 47.

The square root of 135539975 is about 11642.1636734758. The cubic root of 135539975 is about 513.6758328337.

The spelling of 135539975 in words is "one hundred thirty-five million, five hundred thirty-nine thousand, nine hundred seventy-five".