135606025 has 27 divisors (see below), whose sum is σ = 179937919. Its totient is φ = 101358080.

The previous prime is 135606019. The next prime is 135606049. The reversal of 135606025 is 520606531.

The square root of 135606025 is 11645.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 13 ways, for example, as 36324729 + 99281296 = 6027^2 + 9964^2 .

It is not a de Polignac number, because 135606025 - 2⁹ = 135605513 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 135605984 and 135606002.

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 26 ways as a sum of consecutive naturals, for example, 989757 + ... + 989893.

Almost surely, 2^135606025 is an apocalyptic number.

135606025 is the 11645-th square number.

135606025 is the 5823-rd centered octagonal number.

It is an amenable number.

135606025 is a deficient number, since it is larger than the sum of its proper divisors (44331894).

135606025 is an equidigital number, since it uses as much as digits as its factorization.

135606025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318 (or 159 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 28.

The cubic root of 135606025 is about 513.7592590924.

The spelling of 135606025 in words is "one hundred thirty-five million, six hundred six thousand, twenty-five".