115004561 has 4 divisors (see below), whose sum is σ = 131433792. Its totient is φ = 98575332.

The previous prime is 115004557. The next prime is 115004597. The reversal of 115004561 is 165400511.

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 115004561 - 2² = 115004557 is a prime.

It is a nialpdrome in base 8.

It is not an unprimeable number, because it can be changed into a prime (115004521) 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, 8214605 + ... + 8214618.

It is an arithmetic number, because the mean of its divisors is an integer number (32858448).

Almost surely, 2^115004561 is an apocalyptic number.

It is an amenable number.

115004561 is a deficient number, since it is larger than the sum of its proper divisors (16429231).

115004561 is an equidigital number, since it uses as much as digits as its factorization.

115004561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16429230.

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 115004561 is about 10724.0179503766. The cubic root of 115004561 is about 486.3008419775.

It can be divided in two parts, 11500 and 4561, that added together give a palindrome (16061).

The spelling of 115004561 in words is "one hundred fifteen million, four thousand, five hundred sixty-one".