135239865 has 8 divisors (see below), whose sum is σ = 216383808. Its totient is φ = 72127920.

The previous prime is 135239857. The next prime is 135239893. The reversal of 135239865 is 568932531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 135239865 - 2³ = 135239857 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax 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 7 ways as a sum of consecutive naturals, for example, 4507981 + ... + 4508010.

It is an arithmetic number, because the mean of its divisors is an integer number (27047976).

Almost surely, 2^135239865 is an apocalyptic number.

135239865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

135239865 is a deficient number, since it is larger than the sum of its proper divisors (81143943).

135239865 is an equidigital number, since it uses as much as digits as its factorization.

135239865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9015999.

The product of its digits is 194400, while the sum is 42.

The square root of 135239865 is about 11629.2676037659. The cubic root of 135239865 is about 513.2964289637.

The spelling of 135239865 in words is "one hundred thirty-five million, two hundred thirty-nine thousand, eight hundred sixty-five".