135420085 has 4 divisors (see below), whose sum is σ = 162504108. Its totient is φ = 108336064.

The previous prime is 135420041. The next prime is 135420101. The reversal of 135420085 is 580024531.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 107308881 + 28111204 = 10359^2 + 5302^2 .

It is a cyclic number.

It is not a de Polignac number, because 135420085 - 2⁷ = 135419957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13542004 + ... + 13542013.

It is an arithmetic number, because the mean of its divisors is an integer number (40626027).

Almost surely, 2^135420085 is an apocalyptic number.

It is an amenable number.

135420085 is a deficient number, since it is larger than the sum of its proper divisors (27084023).

135420085 is an equidigital number, since it uses as much as digits as its factorization.

135420085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27084022.

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 135420085 is about 11637.0135773746. The cubic root of 135420085 is about 513.5243332178.

The spelling of 135420085 in words is "one hundred thirty-five million, four hundred twenty thousand, eighty-five".