136775261 has 4 divisors (see below), whose sum is σ = 156314592. Its totient is φ = 117235932.

The previous prime is 136775239. The next prime is 136775263. The reversal of 136775261 is 162577631.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 136775261 - 2²² = 132580957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136775263) 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, 9769655 + ... + 9769668.

It is an arithmetic number, because the mean of its divisors is an integer number (39078648).

Almost surely, 2^136775261 is an apocalyptic number.

It is an amenable number.

136775261 is a deficient number, since it is larger than the sum of its proper divisors (19539331).

136775261 is an equidigital number, since it uses as much as digits as its factorization.

136775261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19539330.

The product of its digits is 52920, while the sum is 38.

The square root of 136775261 is about 11695.0955960180. The cubic root of 136775261 is about 515.2316311229.

The spelling of 136775261 in words is "one hundred thirty-six million, seven hundred seventy-five thousand, two hundred sixty-one".