135577261 has 4 divisors (see below), whose sum is σ = 143552412. Its totient is φ = 127602112.

The previous prime is 135577259. The next prime is 135577297. The reversal of 135577261 is 162775531.

135577261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 162775531 = 23 ⋅7077197.

It can be written as a sum of positive squares in 2 ways, for example, as 125014761 + 10562500 = 11181^2 + 3250^2 .

It is a cyclic number.

It is not a de Polignac number, because 135577261 - 2¹ = 135577259 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 135577261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135577231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3987550 + ... + 3987583.

It is an arithmetic number, because the mean of its divisors is an integer number (35888103).

Almost surely, 2^135577261 is an apocalyptic number.

It is an amenable number.

135577261 is a deficient number, since it is larger than the sum of its proper divisors (7975151).

135577261 is an equidigital number, since it uses as much as digits as its factorization.

135577261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7975150.

The product of its digits is 44100, while the sum is 37.

The square root of 135577261 is about 11643.7648980044. The cubic root of 135577261 is about 513.7229312662.

The spelling of 135577261 in words is "one hundred thirty-five million, five hundred seventy-seven thousand, two hundred sixty-one".