128087625 has 32 divisors (see below), whose sum is σ = 216103680. Its totient is φ = 67363200.

The previous prime is 128087623. The next prime is 128087651. The reversal of 128087625 is 526780821.

It is not a de Polignac number, because 128087625 - 2¹ = 128087623 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (128087623) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25036 + ... + 29714.

It is an arithmetic number, because the mean of its divisors is an integer number (6753240).

Almost surely, 2^128087625 is an apocalyptic number.

128087625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

128087625 is a deficient number, since it is larger than the sum of its proper divisors (88016055).

128087625 is an equidigital number, since it uses as much as digits as its factorization.

128087625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4770 (or 4760 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 39.

The square root of 128087625 is about 11317.5803509407. The cubic root of 128087625 is about 504.0833943322.

The spelling of 128087625 in words is "one hundred twenty-eight million, eighty-seven thousand, six hundred twenty-five".