7925128 has 32 divisors (see below), whose sum is σ = 16567200. Its totient is φ = 3532032.

The previous prime is 7925123. The next prime is 7925173. The reversal of 7925128 is 8215297.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a d-powerful number, because it can be written as 7⁸ + 9⁵ + 2² + 5² + 1 + 2²¹ + 8⁴ .

It is a junction number, because it is equal to n+sod(n) for n = 7925093 and 7925102.

It is not an unprimeable number, because it can be changed into a prime (7925123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1051 + ... + 4117.

It is an arithmetic number, because the mean of its divisors is an integer number (517725).

Almost surely, 2^7925128 is an apocalyptic number.

It is an amenable number.

7925128 is an abundant number, since it is smaller than the sum of its proper divisors (8642072).

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

7925128 is a wasteful number, since it uses less digits than its factorization.

7925128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3109 (or 3105 counting only the distinct ones).

The product of its digits is 10080, while the sum is 34.

The square root of 7925128 is about 2815.1603861947. The cubic root of 7925128 is about 199.3741100185.

The spelling of 7925128 in words is "seven million, nine hundred twenty-five thousand, one hundred twenty-eight".