128425556 has 24 divisors (see below), whose sum is σ = 257100480. Its totient is φ = 54986112.

The previous prime is 128425547. The next prime is 128425559. The reversal of 128425556 is 655524821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128425559) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43916 + ... + 46748.

It is an arithmetic number, because the mean of its divisors is an integer number (10712520).

Almost surely, 2^128425556 is an apocalyptic number.

It is a pronic number, being equal to 11332×11333.

It is an amenable number.

128425556 is an abundant number, since it is smaller than the sum of its proper divisors (128674924).

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

128425556 is a wasteful number, since it uses less digits than its factorization.

128425556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4463 (or 4461 counting only the distinct ones).

The product of its digits is 96000, while the sum is 38.

The square root of 128425556 is about 11332.4999889698. The cubic root of 128425556 is about 504.5263094028.

The spelling of 128425556 in words is "one hundred twenty-eight million, four hundred twenty-five thousand, five hundred fifty-six".