115266561 has 16 divisors (see below), whose sum is σ = 159356160. Its totient is φ = 74023040.

The previous prime is 115266517. The next prime is 115266601. The reversal of 115266561 is 165662511.

It is a cyclic number.

It is not a de Polignac number, because 115266561 - 2¹³ = 115258369 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (115266061) 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, 44056 + ... + 46598.

It is an arithmetic number, because the mean of its divisors is an integer number (9959760).

Almost surely, 2^115266561 is an apocalyptic number.

It is an amenable number.

115266561 is a deficient number, since it is larger than the sum of its proper divisors (44089599).

115266561 is a wasteful number, since it uses less digits than its factorization.

115266561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3096.

The product of its digits is 10800, while the sum is 33.

The square root of 115266561 is about 10736.2265717523. The cubic root of 115266561 is about 486.6698539751.

The spelling of 115266561 in words is "one hundred fifteen million, two hundred sixty-six thousand, five hundred sixty-one".