135607261 has 8 divisors (see below), whose sum is σ = 137814264. Its totient is φ = 133416960.

The previous prime is 135607259. The next prime is 135607273. The reversal of 135607261 is 162706531.

135607261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 34222500 + 101384761 = 5850^2 + 10069^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 135607261 - 2¹ = 135607259 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135607201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12741 + ... + 20821.

It is an arithmetic number, because the mean of its divisors is an integer number (17226783).

Almost surely, 2^135607261 is an apocalyptic number.

It is an amenable number.

135607261 is a deficient number, since it is larger than the sum of its proper divisors (2207003).

135607261 is an equidigital number, since it uses as much as digits as its factorization.

135607261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8351.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 135607261 is about 11645.0530698662. The cubic root of 135607261 is about 513.7608199977.

The spelling of 135607261 in words is "one hundred thirty-five million, six hundred seven thousand, two hundred sixty-one".