7128375 has 16 divisors (see below), whose sum is σ = 11862240. Its totient is φ = 3801600.

The previous prime is 7128361. The next prime is 7128391. The reversal of 7128375 is 5738217.

It is not a de Polignac number, because 7128375 - 2¹² = 7124279 is a prime.

7128375 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9130 + ... + 9879.

It is an arithmetic number, because the mean of its divisors is an integer number (741390).

Almost surely, 2^7128375 is an apocalyptic number.

7128375 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

7128375 is a deficient number, since it is larger than the sum of its proper divisors (4733865).

7128375 is a wasteful number, since it uses less digits than its factorization.

7128375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19027 (or 19017 counting only the distinct ones).

The product of its digits is 11760, while the sum is 33.

The square root of 7128375 is about 2669.9016835831. The cubic root of 7128375 is about 192.4554346715.

It can be divided in two parts, 7128 and 375, that added together give a triangular number (7503 = T₁₂₂).

The spelling of 7128375 in words is "seven million, one hundred twenty-eight thousand, three hundred seventy-five".