2128459 has 4 divisors (see below), whose sum is σ = 2136816. Its totient is φ = 2120104.

The previous prime is 2128453. The next prime is 2128463. The reversal of 2128459 is 9548212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2128459 - 2⁹ = 2127947 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 2128459.

It is not an unprimeable number, because it can be changed into a prime (2128453) 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, 3784 + ... + 4309.

It is an arithmetic number, because the mean of its divisors is an integer number (534204).

2^2128459 is an apocalyptic number.

2128459 is a deficient number, since it is larger than the sum of its proper divisors (8357).

2128459 is an equidigital number, since it uses as much as digits as its factorization.

2128459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8356.

The product of its digits is 5760, while the sum is 31.

The square root of 2128459 is about 1458.9239185098. The cubic root of 2128459 is about 128.6337990746.

The spelling of 2128459 in words is "two million, one hundred twenty-eight thousand, four hundred fifty-nine".