136505265 has 16 divisors (see below), whose sum is σ = 235209408. Its totient is φ = 67202496.

The previous prime is 136505261. The next prime is 136505267. The reversal of 136505265 is 562505631.

It is not a de Polignac number, because 136505265 - 2² = 136505261 is a prime.

It is not an unprimeable number, because it can be changed into a prime (136505261) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 349819 + ... + 350208.

It is an arithmetic number, because the mean of its divisors is an integer number (14700588).

Almost surely, 2^136505265 is an apocalyptic number.

136505265 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

136505265 is a deficient number, since it is larger than the sum of its proper divisors (98704143).

136505265 is a wasteful number, since it uses less digits than its factorization.

136505265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700048.

The product of its (nonzero) digits is 27000, while the sum is 33.

The square root of 136505265 is about 11683.5467645745. The cubic root of 136505265 is about 514.8923833325.

It can be divided in two parts, 13650 and 5265, that added together give a triangular number (18915 = T₁₉₄).

The spelling of 136505265 in words is "one hundred thirty-six million, five hundred five thousand, two hundred sixty-five".