135686585 has 16 divisors (see below), whose sum is σ = 167648400. Its totient is φ = 105348096.

The previous prime is 135686567. The next prime is 135686611. The reversal of 135686585 is 585686531.

It can be written as a sum of positive squares in 8 ways, for example, as 2676496 + 133010089 = 1636^2 + 11533^2 .

It is a cyclic number.

It is not a de Polignac number, because 135686585 - 2¹⁴ = 135670201 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104621 + ... + 105909.

It is an arithmetic number, because the mean of its divisors is an integer number (10478025).

Almost surely, 2^135686585 is an apocalyptic number.

It is an amenable number.

135686585 is a deficient number, since it is larger than the sum of its proper divisors (31961815).

135686585 is a wasteful number, since it uses less digits than its factorization.

135686585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1900.

The product of its digits is 864000, while the sum is 47.

The square root of 135686585 is about 11648.4584817048. The cubic root of 135686585 is about 513.8609759413.

The spelling of 135686585 in words is "one hundred thirty-five million, six hundred eighty-six thousand, five hundred eighty-five".