4028125 has 12 divisors (see below), whose sum is σ = 5038740. Its totient is φ = 3220000.

The previous prime is 4028093. The next prime is 4028137. The reversal of 4028125 is 5218204.

It can be written as a sum of positive squares in 6 ways, for example, as 2748964 + 1279161 = 1658^2 + 1131^2 .

It is not a de Polignac number, because 4028125 - 2⁵ = 4028093 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4028096 and 4028105.

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, 2481 + ... + 3769.

It is an arithmetic number, because the mean of its divisors is an integer number (419895).

Almost surely, 2^4028125 is an apocalyptic number.

It is an amenable number.

4028125 is a deficient number, since it is larger than the sum of its proper divisors (1010615).

4028125 is an frugal number, since it uses more digits than its factorization.

4028125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1314 (or 1294 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 4028125 is about 2007.0189336426. The cubic root of 4028125 is about 159.1112837232. Note that the first 3 decimals are identical.

The spelling of 4028125 in words is "four million, twenty-eight thousand, one hundred twenty-five".