78125115 has 32 divisors (see below), whose sum is σ = 136636416. Its totient is φ = 37946880.

The previous prime is 78125059. The next prime is 78125119. The reversal of 78125115 is 51152187.

It is not a de Polignac number, because 78125115 - 2⁶ = 78125051 is a prime.

It is a super-2 number, since 2×78125115² = 12207067187526450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78125119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2964 + ... + 12846.

It is an arithmetic number, because the mean of its divisors is an integer number (4269888).

Almost surely, 2^78125115 is an apocalyptic number.

78125115 is a deficient number, since it is larger than the sum of its proper divisors (58511301).

78125115 is a wasteful number, since it uses less digits than its factorization.

78125115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9939.

The product of its digits is 2800, while the sum is 30.

The square root of 78125115 is about 8838.8412702118. The cubic root of 78125115 is about 427.4941964261.

The spelling of 78125115 in words is "seventy-eight million, one hundred twenty-five thousand, one hundred fifteen".