128425420 has 12 divisors (see below), whose sum is σ = 269693424. Its totient is φ = 51370160.

The previous prime is 128425397. The next prime is 128425421. The reversal of 128425420 is 24524821.

It is not an unprimeable number, because it can be changed into a prime (128425421) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 3210616 + ... + 3210655.

It is an arithmetic number, because the mean of its divisors is an integer number (22474452).

Almost surely, 2^128425420 is an apocalyptic number.

128425420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128425420 is an abundant number, since it is smaller than the sum of its proper divisors (141268004).

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

128425420 is a wasteful number, since it uses less digits than its factorization.

128425420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6421280 (or 6421278 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 28.

The square root of 128425420 is about 11332.4939885270. The cubic root of 128425420 is about 504.5261313085.

The spelling of 128425420 in words is "one hundred twenty-eight million, four hundred twenty-five thousand, four hundred twenty".