4128125 has 12 divisors (see below), whose sum is σ = 5163732. Its totient is φ = 3300000.

The previous prime is 4128119. The next prime is 4128133. The reversal of 4128125 is 5218214.

It can be written as a sum of positive squares in 6 ways, for example, as 2474329 + 1653796 = 1573^2 + 1286^2 .

It is not a de Polignac number, because 4128125 - 2¹⁶ = 4062589 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 4128125.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2465 + ... + 3785.

It is an arithmetic number, because the mean of its divisors is an integer number (430311).

Almost surely, 2^4128125 is an apocalyptic number.

It is an amenable number.

4128125 is a deficient number, since it is larger than the sum of its proper divisors (1035607).

4128125 is an frugal number, since it uses more digits than its factorization.

4128125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1346 (or 1326 counting only the distinct ones).

The product of its digits is 640, while the sum is 23.

The square root of 4128125 is about 2031.7787773279. The cubic root of 4128125 is about 160.4172054479.

The spelling of 4128125 in words is "four million, one hundred twenty-eight thousand, one hundred twenty-five".