136605261 has 8 divisors (see below), whose sum is σ = 196151200. Its totient is φ = 84064752.

The previous prime is 136605241. The next prime is 136605263. The reversal of 136605261 is 162506631.

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

It is not a de Polignac number, because 136605261 - 2⁹ = 136604749 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 (136605263) 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, 1751311 + ... + 1751388.

It is an arithmetic number, because the mean of its divisors is an integer number (24518900).

Almost surely, 2^136605261 is an apocalyptic number.

It is an amenable number.

136605261 is a deficient number, since it is larger than the sum of its proper divisors (59545939).

136605261 is a wasteful number, since it uses less digits than its factorization.

136605261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3502715.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 136605261 is about 11687.8253323704. The cubic root of 136605261 is about 515.0180796116.

The spelling of 136605261 in words is "one hundred thirty-six million, six hundred five thousand, two hundred sixty-one".