128584425 has 24 divisors (see below), whose sum is σ = 213111360. Its totient is φ = 68411200.

The previous prime is 128584403. The next prime is 128584439. The reversal of 128584425 is 524485821.

It is a happy number.

It is not a de Polignac number, because 128584425 - 2¹⁸ = 128322281 is a prime.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32716 + ... + 36434.

It is an arithmetic number, because the mean of its divisors is an integer number (8879640).

Almost surely, 2^128584425 is an apocalyptic number.

128584425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

128584425 is a deficient number, since it is larger than the sum of its proper divisors (84526935).

128584425 is a wasteful number, since it uses less digits than its factorization.

128584425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4193 (or 4188 counting only the distinct ones).

The product of its digits is 102400, while the sum is 39.

The square root of 128584425 is about 11339.5072644273. The cubic root of 128584425 is about 504.7342653167.

The spelling of 128584425 in words is "one hundred twenty-eight million, five hundred eighty-four thousand, four hundred twenty-five".