4028425 has 6 divisors (see below), whose sum is σ = 4995278. Its totient is φ = 3222720.

The previous prime is 4028413. The next prime is 4028429. The reversal of 4028425 is 5248204.

It is a happy number.

4028425 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 1042441 + 2985984 = 1021^2 + 1728^2 .

It is not a de Polignac number, because 4028425 - 2⁹ = 4027913 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 161137 = 4028425 / (4 + 0 + 2 + 8 + 4 + 2 + 5).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4028425.

It is not an unprimeable number, because it can be changed into a prime (4028429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 80544 + ... + 80593.

Almost surely, 2^4028425 is an apocalyptic number.

It is an amenable number.

4028425 is a deficient number, since it is larger than the sum of its proper divisors (966853).

4028425 is a wasteful number, since it uses less digits than its factorization.

4028425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161147 (or 161142 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 25.

The square root of 4028425 is about 2007.0936699616. The cubic root of 4028425 is about 159.1152336338.

The spelling of 4028425 in words is "four million, twenty-eight thousand, four hundred twenty-five".