7305128 has 16 divisors (see below), whose sum is σ = 13834260. Its totient is φ = 3616000.

The previous prime is 7305097. The next prime is 7305161. The reversal of 7305128 is 8215037.

It can be written as a sum of positive squares in 2 ways, for example, as 4674244 + 2630884 = 2162^2 + 1622^2 .

It is a junction number, because it is equal to n+sod(n) for n = 7305097 and 7305106.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3713 + ... + 5328.

Almost surely, 2^7305128 is an apocalyptic number.

It is an amenable number.

7305128 is a deficient number, since it is larger than the sum of its proper divisors (6529132).

7305128 is a wasteful number, since it uses less digits than its factorization.

7305128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9148 (or 9144 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 7305128 is about 2702.8000295989. The cubic root of 7305128 is about 194.0331540744.

Subtracting 7305128 from its reverse (8215037), we obtain a palindrome (909909).

The spelling of 7305128 in words is "seven million, three hundred five thousand, one hundred twenty-eight".