135686825 has 6 divisors (see below), whose sum is σ = 168251694. Its totient is φ = 108549440.

The previous prime is 135686813. The next prime is 135686857. The reversal of 135686825 is 528686531.

It can be written as a sum of positive squares in 3 ways, for example, as 42680089 + 93006736 = 6533^2 + 9644^2 .

It is not a de Polignac number, because 135686825 - 2¹⁰ = 135685801 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2713712 + ... + 2713761.

It is an arithmetic number, because the mean of its divisors is an integer number (28041949).

Almost surely, 2^135686825 is an apocalyptic number.

It is an amenable number.

135686825 is a deficient number, since it is larger than the sum of its proper divisors (32564869).

135686825 is an equidigital number, since it uses as much as digits as its factorization.

135686825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5427483 (or 5427478 counting only the distinct ones).

The product of its digits is 345600, while the sum is 44.

The square root of 135686825 is about 11648.4687834925. The cubic root of 135686825 is about 513.8612789105.

The spelling of 135686825 in words is "one hundred thirty-five million, six hundred eighty-six thousand, eight hundred twenty-five".