2129128 has 16 divisors (see below), whose sum is σ = 4100580. Its totient is φ = 1035648.

The previous prime is 2129123. The next prime is 2129161. The reversal of 2129128 is 8219212.

It can be written as a sum of positive squares in 2 ways, for example, as 2125764 + 3364 = 1458^2 + 58^2 .

It is not an unprimeable number, because it can be changed into a prime (2129123) 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, 3301 + ... + 3892.

2^2129128 is an apocalyptic number.

It is an amenable number.

2129128 is a deficient number, since it is larger than the sum of its proper divisors (1971452).

2129128 is a wasteful number, since it uses less digits than its factorization.

2129128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7236 (or 7232 counting only the distinct ones).

The product of its digits is 576, while the sum is 25.

The square root of 2129128 is about 1459.1531790734. The cubic root of 2129128 is about 128.6472747076.

The spelling of 2129128 in words is "two million, one hundred twenty-nine thousand, one hundred twenty-eight".