115489561 has 8 divisors (see below), whose sum is σ = 127237248. Its totient is φ = 103950000.

The previous prime is 115489559. The next prime is 115489573. The reversal of 115489561 is 165984511.

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

It is not a de Polignac number, because 115489561 - 2¹ = 115489559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115489061) 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, 50865 + ... + 53086.

It is an arithmetic number, because the mean of its divisors is an integer number (15904656).

Almost surely, 2^115489561 is an apocalyptic number.

115489561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

115489561 is a deficient number, since it is larger than the sum of its proper divisors (11747687).

115489561 is a wasteful number, since it uses less digits than its factorization.

115489561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104063.

The product of its digits is 43200, while the sum is 40.

The square root of 115489561 is about 10746.6069528945. The cubic root of 115489561 is about 486.9834964408.

The spelling of 115489561 in words is "one hundred fifteen million, four hundred eighty-nine thousand, five hundred sixty-one".