128581204 has 6 divisors (see below), whose sum is σ = 225017114. Its totient is φ = 64290600.

The previous prime is 128581171. The next prime is 128581261. The reversal of 128581204 is 402185821.

It can be written as a sum of positive squares in only one way, i.e., 115992900 + 12588304 = 10770^2 + 3548^2 .

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 as a sum of consecutive naturals, namely, 16072647 + ... + 16072654.

Almost surely, 2^128581204 is an apocalyptic number.

It is an amenable number.

128581204 is a deficient number, since it is larger than the sum of its proper divisors (96435910).

128581204 is a wasteful number, since it uses less digits than its factorization.

128581204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32145305 (or 32145303 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 31.

The square root of 128581204 is about 11339.3652379664. The cubic root of 128581204 is about 504.7300508025.

The spelling of 128581204 in words is "one hundred twenty-eight million, five hundred eighty-one thousand, two hundred four".