2021128 has 8 divisors (see below), whose sum is σ = 3789630. Its totient is φ = 1010560.

The previous prime is 2021119. The next prime is 2021137. The reversal of 2021128 is 8211202.

It is an interprime number because it is at equal distance from previous prime (2021119) and next prime (2021137).

It can be written as a sum of positive squares in only one way, i.e., 2010724 + 10404 = 1418^2 + 102^2 .

It is a tau number, because it is divible by the number of its divisors (8).

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 as a sum of consecutive naturals, namely, 126313 + ... + 126328.

2^2021128 is an apocalyptic number.

It is an amenable number.

2021128 is a deficient number, since it is larger than the sum of its proper divisors (1768502).

2021128 is a wasteful number, since it uses less digits than its factorization.

2021128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252647 (or 252643 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 2021128 is about 1421.6638139870. The cubic root of 2021128 is about 126.4342120178.

The spelling of 2021128 in words is "two million, twenty-one thousand, one hundred twenty-eight".