4128559 has 4 divisors (see below), whose sum is σ = 4224616. Its totient is φ = 4032504.

The previous prime is 4128557. The next prime is 4128581. The reversal of 4128559 is 9558214.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9558214 = 2 ⋅4779107.

It is a cyclic number.

It is not a de Polignac number, because 4128559 - 2¹ = 4128557 is a prime.

It is a Duffinian number.

4128559 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4128557) 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, 47964 + ... + 48049.

It is an arithmetic number, because the mean of its divisors is an integer number (1056154).

Almost surely, 2^4128559 is an apocalyptic number.

4128559 is a deficient number, since it is larger than the sum of its proper divisors (96057).

4128559 is an equidigital number, since it uses as much as digits as its factorization.

4128559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96056.

The product of its digits is 14400, while the sum is 34.

The square root of 4128559 is about 2031.8855774871. The cubic root of 4128559 is about 160.4228269368.

The spelling of 4128559 in words is "four million, one hundred twenty-eight thousand, five hundred fifty-nine".