128282725 has 24 divisors (see below), whose sum is σ = 162302112. Its totient is φ = 100564800.

The previous prime is 128282719. The next prime is 128282779. The reversal of 128282725 is 527282821.

It is a happy number.

It is not a de Polignac number, because 128282725 - 2¹⁹ = 127758437 is a prime.

It is a super-3 number, since 3×128282725³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

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, 437679 + ... + 437971.

It is an arithmetic number, because the mean of its divisors is an integer number (6762588).

Almost surely, 2^128282725 is an apocalyptic number.

It is an amenable number.

128282725 is a deficient number, since it is larger than the sum of its proper divisors (34019387).

128282725 is a wasteful number, since it uses less digits than its factorization.

128282725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 597 (or 592 counting only the distinct ones).

The product of its digits is 35840, while the sum is 37.

The square root of 128282725 is about 11326.1964047954. The cubic root of 128282725 is about 504.3392004111.

The spelling of 128282725 in words is "one hundred twenty-eight million, two hundred eighty-two thousand, seven hundred twenty-five".