115878257 has 4 divisors (see below), whose sum is σ = 126412656. Its totient is φ = 105343860.

The previous prime is 115878253. The next prime is 115878271. The reversal of 115878257 is 752878511.

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 115878257 - 2² = 115878253 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115878253) 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 3 ways as a sum of consecutive naturals, for example, 5267183 + ... + 5267204.

It is an arithmetic number, because the mean of its divisors is an integer number (31603164).

Almost surely, 2^115878257 is an apocalyptic number.

It is an amenable number.

115878257 is a deficient number, since it is larger than the sum of its proper divisors (10534399).

115878257 is a wasteful number, since it uses less digits than its factorization.

115878257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10534398.

The product of its digits is 156800, while the sum is 44.

The square root of 115878257 is about 10764.6763537043. The cubic root of 115878257 is about 487.5292213034.

The spelling of 115878257 in words is "one hundred fifteen million, eight hundred seventy-eight thousand, two hundred fifty-seven".