4128425 has 24 divisors (see below), whose sum is σ = 6047232. Its totient is φ = 2736000.

The previous prime is 4128409. The next prime is 4128427. The reversal of 4128425 is 5248214.

It is a happy number.

It is not a de Polignac number, because 4128425 - 2⁴ = 4128409 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4128394 and 4128403.

It is not an unprimeable number, because it can be changed into a prime (4128427) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5045 + ... + 5805.

It is an arithmetic number, because the mean of its divisors is an integer number (251968).

Almost surely, 2^4128425 is an apocalyptic number.

It is an amenable number.

4128425 is a deficient number, since it is larger than the sum of its proper divisors (1918807).

4128425 is a wasteful number, since it uses less digits than its factorization.

4128425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 809 (or 804 counting only the distinct ones).

The product of its digits is 2560, while the sum is 26.

The square root of 4128425 is about 2031.8526029218. The cubic root of 4128425 is about 160.4210913118.

The spelling of 4128425 in words is "four million, one hundred twenty-eight thousand, four hundred twenty-five".