128878325 has 6 divisors (see below), whose sum is σ = 159809154. Its totient is φ = 103102640.

The previous prime is 128878313. The next prime is 128878339. The reversal of 128878325 is 523878821.

It can be written as a sum of positive squares in 3 ways, for example, as 33124 + 128845201 = 182^2 + 11351^2 .

It is not a de Polignac number, because 128878325 - 2⁶ = 128878261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2577542 + ... + 2577591.

It is an arithmetic number, because the mean of its divisors is an integer number (26634859).

Almost surely, 2^128878325 is an apocalyptic number.

It is an amenable number.

128878325 is a deficient number, since it is larger than the sum of its proper divisors (30930829).

128878325 is an equidigital number, since it uses as much as digits as its factorization.

128878325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5155143 (or 5155138 counting only the distinct ones).

The product of its digits is 215040, while the sum is 44.

The square root of 128878325 is about 11352.4589847310. The cubic root of 128878325 is about 505.1185226497.

It can be divided in two parts, 12887 and 8325, that added together give a palindrome (21212).

The spelling of 128878325 in words is "one hundred twenty-eight million, eight hundred seventy-eight thousand, three hundred twenty-five".