2128775 has 12 divisors (see below), whose sum is σ = 2880024. Its totient is φ = 1548000.

The previous prime is 2128769. The next prime is 2128781. The reversal of 2128775 is 5778212.

2128775 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2128769) and next prime (2128781).

It is not a de Polignac number, because 2128775 - 2¹⁰ = 2127751 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3596 + ... + 4145.

It is an arithmetic number, because the mean of its divisors is an integer number (240002).

2^2128775 is an apocalyptic number.

2128775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2128775 is a deficient number, since it is larger than the sum of its proper divisors (751249).

2128775 is a wasteful number, since it uses less digits than its factorization.

2128775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7762 (or 7757 counting only the distinct ones).

The product of its digits is 7840, while the sum is 32.

The square root of 2128775 is about 1459.0322134895. The cubic root of 2128775 is about 128.6401645984.

The spelling of 2128775 in words is "two million, one hundred twenty-eight thousand, seven hundred seventy-five".