135870 has 32 divisors (see below), whose sum is σ = 373248. Its totient is φ = 31008.

The previous prime is 135859. The next prime is 135887. The reversal of 135870 is 78531.

135870 is nontrivially palindromic in base 12.

135870 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 135870.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 135870.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 114 + ... + 533.

It is an arithmetic number, because the mean of its divisors is an integer number (11664).

2¹³⁵⁸⁷⁰ is an apocalyptic number.

135870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

135870 is an abundant number, since it is smaller than the sum of its proper divisors (237378).

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

135870 is a wasteful number, since it uses less digits than its factorization.

135870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664.

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 135870 is about 368.6054801546. The cubic root of 135870 is about 51.4092409715.

The spelling of 135870 in words is "one hundred thirty-five thousand, eight hundred seventy".