115878505 has 8 divisors (see below), whose sum is σ = 142446024. Its totient is φ = 90441600.

The previous prime is 115878481. The next prime is 115878509. The reversal of 115878505 is 505878511.

It can be written as a sum of positive squares in 4 ways, for example, as 4618201 + 111260304 = 2149^2 + 10548^2 .

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

It is not a de Polignac number, because 115878505 - 2⁷ = 115878377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115878509) 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 7 ways as a sum of consecutive naturals, for example, 282426 + ... + 282835.

It is an arithmetic number, because the mean of its divisors is an integer number (17805753).

Almost surely, 2^115878505 is an apocalyptic number.

It is an amenable number.

115878505 is a deficient number, since it is larger than the sum of its proper divisors (26567519).

115878505 is an equidigital number, since it uses as much as digits as its factorization.

115878505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 565307.

The product of its (nonzero) digits is 56000, while the sum is 40.

The square root of 115878505 is about 10764.6878728554. The cubic root of 115878505 is about 487.5295691028.

The spelling of 115878505 in words is "one hundred fifteen million, eight hundred seventy-eight thousand, five hundred five".