4128256 has 40 divisors (see below), whose sum is σ = 9010584. Its totient is φ = 1873920.

The previous prime is 4128253. The next prime is 4128281. The reversal of 4128256 is 6528214.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4128251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5266 + ... + 5998.

Almost surely, 2^4128256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4128256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4505292).

4128256 is an abundant number, since it is smaller than the sum of its proper divisors (4882328).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4128256 is an equidigital number, since it uses as much as digits as its factorization.

4128256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 762 (or 746 counting only the distinct ones).

The product of its digits is 3840, while the sum is 28.

The square root of 4128256 is about 2031.8110148338. The cubic root of 4128256 is about 160.4189022983.

It can be divided in two parts, 412 and 8256, that added together give a palindrome (8668).

The spelling of 4128256 in words is "four million, one hundred twenty-eight thousand, two hundred fifty-six".