128146725 has 96 divisors (see below), whose sum is σ = 276688640. Its totient is φ = 56920320.

The previous prime is 128146717. The next prime is 128146757. The reversal of 128146725 is 527641821.

It is not a de Polignac number, because 128146725 - 2³ = 128146717 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 128146725.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 174459 + ... + 175191.

Almost surely, 2^128146725 is an apocalyptic number.

128146725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

128146725 is an abundant number, since it is smaller than the sum of its proper divisors (148541915).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128146725 is a wasteful number, since it uses less digits than its factorization.

128146725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 796 (or 785 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 128146725 is about 11320.1910319570. The cubic root of 128146725 is about 504.1609109225.

The spelling of 128146725 in words is "one hundred twenty-eight million, one hundred forty-six thousand, seven hundred twenty-five".