128988025 has 12 divisors (see below), whose sum is σ = 166900032. Its totient is φ = 98703440.

The previous prime is 128988011. The next prime is 128988049. The reversal of 128988025 is 520889821.

It is not a de Polignac number, because 128988025 - 2⁷ = 128987897 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 111589 + ... + 112738.

It is an arithmetic number, because the mean of its divisors is an integer number (13908336).

Almost surely, 2^128988025 is an apocalyptic number.

It is an amenable number.

128988025 is a deficient number, since it is larger than the sum of its proper divisors (37912007).

128988025 is a wasteful number, since it uses less digits than its factorization.

128988025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224360 (or 224355 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 43.

The square root of 128988025 is about 11357.2895093856. The cubic root of 128988025 is about 505.2617993603.

The spelling of 128988025 in words is "one hundred twenty-eight million, nine hundred eighty-eight thousand, twenty-five".