135906 has 8 divisors (see below), whose sum is σ = 271824. Its totient is φ = 45300.

The previous prime is 135899. The next prime is 135911. The reversal of 135906 is 609531.

It is a sphenic number, since it is the product of 3 distinct primes.

135906 is an admirable number.

It is an unprimeable number.

135906 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11320 + ... + 11331.

It is an arithmetic number, because the mean of its divisors is an integer number (33978).

2¹³⁵⁹⁰⁶ is an apocalyptic number.

135906 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

135906 is a wasteful number, since it uses less digits than its factorization.

135906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22656.

The product of its (nonzero) digits is 810, while the sum is 24.

The square root of 135906 is about 368.6543096181. The cubic root of 135906 is about 51.4137810202.

The spelling of 135906 in words is "one hundred thirty-five thousand, nine hundred six".