128321204 has 12 divisors (see below), whose sum is σ = 244976928. Its totient is φ = 58327800.

The previous prime is 128321197. The next prime is 128321243. The reversal of 128321204 is 402123821.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 128321204.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1458152 + ... + 1458239.

It is an arithmetic number, because the mean of its divisors is an integer number (20414744).

Almost surely, 2^128321204 is an apocalyptic number.

It is an amenable number.

128321204 is a deficient number, since it is larger than the sum of its proper divisors (116655724).

128321204 is a wasteful number, since it uses less digits than its factorization.

128321204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2916406 (or 2916404 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 128321204 is about 11327.8949500779. The cubic root of 128321204 is about 504.3896216664.

The spelling of 128321204 in words is "one hundred twenty-eight million, three hundred twenty-one thousand, two hundred four".