135171805 has 8 divisors (see below), whose sum is σ = 169258752. Its totient is φ = 103435728.

The previous prime is 135171781. The next prime is 135171821. The reversal of 135171805 is 508171531.

135171805 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 135171805 - 2⁹ = 135171293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 587589 + ... + 587818.

It is an arithmetic number, because the mean of its divisors is an integer number (21157344).

Almost surely, 2^135171805 is an apocalyptic number.

It is an amenable number.

135171805 is a deficient number, since it is larger than the sum of its proper divisors (34086947).

135171805 is a wasteful number, since it uses less digits than its factorization.

135171805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1175435.

The product of its (nonzero) digits is 4200, while the sum is 31.

The square root of 135171805 is about 11626.3409979236. The cubic root of 135171805 is about 513.2103083587.

The spelling of 135171805 in words is "one hundred thirty-five million, one hundred seventy-one thousand, eight hundred five".