2128004 has 6 divisors (see below), whose sum is σ = 3724014. Its totient is φ = 1064000.

The previous prime is 2128001. The next prime is 2128031. The reversal of 2128004 is 4008212.

It can be written as a sum of positive squares in only one way, i.e., 1562500 + 565504 = 1250^2 + 752^2 .

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (2128001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265997 + ... + 266004.

It is an arithmetic number, because the mean of its divisors is an integer number (620669).

2^2128004 is an apocalyptic number.

It is an amenable number.

2128004 is a deficient number, since it is larger than the sum of its proper divisors (1596010).

2128004 is a wasteful number, since it uses less digits than its factorization.

2128004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 532005 (or 532003 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 2128004 is about 1458.7679733254. The cubic root of 2128004 is about 128.6246324194.

The spelling of 2128004 in words is "two million, one hundred twenty-eight thousand, four".