128555245 has 32 divisors (see below), whose sum is σ = 192745728. Its totient is φ = 80137728.

The previous prime is 128555239. The next prime is 128555261. The reversal of 128555245 is 542555821.

It is a cyclic number.

It is not a de Polignac number, because 128555245 - 2³ = 128555237 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28377 + ... + 32593.

It is an arithmetic number, because the mean of its divisors is an integer number (6023304).

Almost surely, 2^128555245 is an apocalyptic number.

It is an amenable number.

128555245 is a deficient number, since it is larger than the sum of its proper divisors (64190483).

128555245 is a wasteful number, since it uses less digits than its factorization.

128555245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4309.

The product of its digits is 80000, while the sum is 37.

The square root of 128555245 is about 11338.2205393968. The cubic root of 128555245 is about 504.6960822057.

The spelling of 128555245 in words is "one hundred twenty-eight million, five hundred fifty-five thousand, two hundred forty-five".