128178325 has 18 divisors (see below), whose sum is σ = 174708002. Its totient is φ = 93218400.

The previous prime is 128178319. The next prime is 128178331. The reversal of 128178325 is 523871821.

It is an interprime number because it is at equal distance from previous prime (128178319) and next prime (128178331).

It can be written as a sum of positive squares in 3 ways, for example, as 58564 + 128119761 = 242^2 + 11319^2 .

It is not a de Polignac number, because 128178325 - 2¹⁷ = 128047253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 18162 + ... + 24211.

Almost surely, 2^128178325 is an apocalyptic number.

It is an amenable number.

128178325 is a deficient number, since it is larger than the sum of its proper divisors (46529677).

128178325 is a wasteful number, since it uses less digits than its factorization.

128178325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42405 (or 42389 counting only the distinct ones).

The product of its digits is 26880, while the sum is 37.

The square root of 128178325 is about 11321.5866820866. The cubic root of 128178325 is about 504.2023482552.

The spelling of 128178325 in words is "one hundred twenty-eight million, one hundred seventy-eight thousand, three hundred twenty-five".