2128359 has 4 divisors (see below), whose sum is σ = 2837816. Its totient is φ = 1418904.

The previous prime is 2128333. The next prime is 2128381. The reversal of 2128359 is 9538212.

It is a happy number.

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

It is not a de Polignac number, because 2128359 - 2⁵ = 2128327 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2128309) 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, 354724 + ... + 354729.

It is an arithmetic number, because the mean of its divisors is an integer number (709454).

2^2128359 is an apocalyptic number.

2128359 is a deficient number, since it is larger than the sum of its proper divisors (709457).

2128359 is an equidigital number, since it uses as much as digits as its factorization.

2128359 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 709456.

The product of its digits is 4320, while the sum is 30.

The square root of 2128359 is about 1458.8896462721. The cubic root of 2128359 is about 128.6317845371.

The spelling of 2128359 in words is "two million, one hundred twenty-eight thousand, three hundred fifty-nine".