135785985 has 16 divisors (see below), whose sum is σ = 217403136. Its totient is φ = 72370688.

The previous prime is 135785977. The next prime is 135786037. The reversal of 135785985 is 589587531.

It is a cyclic number.

It is not a de Polignac number, because 135785985 - 2³ = 135785977 is a prime.

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, 38152 + ... + 41558.

It is an arithmetic number, because the mean of its divisors is an integer number (13587696).

Almost surely, 2^135785985 is an apocalyptic number.

135785985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

135785985 is a deficient number, since it is larger than the sum of its proper divisors (81617151).

135785985 is a wasteful number, since it uses less digits than its factorization.

135785985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6072.

The product of its digits is 1512000, while the sum is 51.

The square root of 135785985 is about 11652.7243595650. The cubic root of 135785985 is about 513.9864251236.

The spelling of 135785985 in words is "one hundred thirty-five million, seven hundred eighty-five thousand, nine hundred eighty-five".