128573557 has 16 divisors (see below), whose sum is σ = 152756352. Its totient is φ = 105917760.

The previous prime is 128573539. The next prime is 128573573. The reversal of 128573557 is 755375821.

It is a cyclic number.

It is not a de Polignac number, because 128573557 - 2²³ = 120184949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128573537) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18507 + ... + 24487.

It is an arithmetic number, because the mean of its divisors is an integer number (9547272).

Almost surely, 2^128573557 is an apocalyptic number.

It is an amenable number.

128573557 is a deficient number, since it is larger than the sum of its proper divisors (24182795).

128573557 is an equidigital number, since it uses as much as digits as its factorization.

128573557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6108.

The product of its digits is 294000, while the sum is 43.

The square root of 128573557 is about 11339.0280447664. The cubic root of 128573557 is about 504.7200448112.

The spelling of 128573557 in words is "one hundred twenty-eight million, five hundred seventy-three thousand, five hundred fifty-seven".