128225120 has 24 divisors (see below), whose sum is σ = 302932224. Its totient is φ = 51289984.

The previous prime is 128225117. The next prime is 128225143. The reversal of 128225120 is 21522821.

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, 400544 + ... + 400863.

It is an arithmetic number, because the mean of its divisors is an integer number (12622176).

Almost surely, 2^128225120 is an apocalyptic number.

128225120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128225120 is an abundant number, since it is smaller than the sum of its proper divisors (174707104).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128225120 is an equidigital number, since it uses as much as digits as its factorization.

128225120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 801422 (or 801414 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 128225120 is about 11323.6531207910. The cubic root of 128225120 is about 504.2636984048.

Adding to 128225120 its reverse (21522821), we get a palindrome (149747941).

The spelling of 128225120 in words is "one hundred twenty-eight million, two hundred twenty-five thousand, one hundred twenty".