128560859 has 16 divisors (see below), whose sum is σ = 157824000. Its totient is φ = 104389992.

The previous prime is 128560853. The next prime is 128560867. The reversal of 128560859 is 958065821.

It is not a de Polignac number, because 128560859 - 2⁸ = 128560603 is a prime.

It is a super-3 number, since 3×128560859³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128560853) 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, 3347 + ... + 16380.

It is an arithmetic number, because the mean of its divisors is an integer number (9864000).

Almost surely, 2^128560859 is an apocalyptic number.

128560859 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

128560859 is a deficient number, since it is larger than the sum of its proper divisors (29263141).

128560859 is an equidigital number, since it uses as much as digits as its factorization.

128560859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19767 (or 19753 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 44.

The square root of 128560859 is about 11338.4681064066. The cubic root of 128560859 is about 504.7034287815.

The spelling of 128560859 in words is "one hundred twenty-eight million, five hundred sixty thousand, eight hundred fifty-nine".