78539125 has 16 divisors (see below), whose sum is σ = 112020480. Its totient is φ = 53854800.

The previous prime is 78539117. The next prime is 78539143. The reversal of 78539125 is 52193587.

It is not a de Polignac number, because 78539125 - 2³ = 78539117 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44005 + ... + 45754.

It is an arithmetic number, because the mean of its divisors is an integer number (7001280).

Almost surely, 2^78539125 is an apocalyptic number.

It is an amenable number.

78539125 is a deficient number, since it is larger than the sum of its proper divisors (33481355).

78539125 is an equidigital number, since it uses as much as digits as its factorization.

78539125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89781 (or 89771 counting only the distinct ones).

The product of its digits is 75600, while the sum is 40.

The square root of 78539125 is about 8862.2302497735. The cubic root of 78539125 is about 428.2480093015.

The spelling of 78539125 in words is "seventy-eight million, five hundred thirty-nine thousand, one hundred twenty-five".