135281586 has 16 divisors (see below), whose sum is σ = 295159968. Its totient is φ = 40994400.

The previous prime is 135281527. The next prime is 135281623. The reversal of 135281586 is 685182531.

It is a super-2 number, since 2×135281586² = 36602215021350792, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 1024795 + ... + 1024926.

It is an arithmetic number, because the mean of its divisors is an integer number (18447498).

Almost surely, 2^135281586 is an apocalyptic number.

135281586 is an abundant number, since it is smaller than the sum of its proper divisors (159878382).

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

135281586 is a wasteful number, since it uses less digits than its factorization.

135281586 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2049737.

The product of its digits is 57600, while the sum is 39.

The square root of 135281586 is about 11631.0612585439. The cubic root of 135281586 is about 513.3492068891.

The spelling of 135281586 in words is "one hundred thirty-five million, two hundred eighty-one thousand, five hundred eighty-six".