2128825 has 12 divisors (see below), whose sum is σ = 2795580. Its totient is φ = 1602560.

The previous prime is 2128823. The next prime is 2128831. The reversal of 2128825 is 5288212.

It can be written as a sum of positive squares in 6 ways, for example, as 144 + 2128681 = 12^2 + 1459^2 .

It is not a de Polignac number, because 2128825 - 2¹ = 2128823 is a prime.

It is a plaindrome in base 11.

It is a junction number, because it is equal to n+sod(n) for n = 2128793 and 2128802.

It is not an unprimeable number, because it can be changed into a prime (2128823) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2080 + ... + 2929.

It is an arithmetic number, because the mean of its divisors is an integer number (232965).

2^2128825 is an apocalyptic number.

2128825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2128825 is a deficient number, since it is larger than the sum of its proper divisors (666755).

2128825 is a wasteful number, since it uses less digits than its factorization.

2128825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5036 (or 5031 counting only the distinct ones).

The product of its digits is 2560, while the sum is 28.

The square root of 2128825 is about 1459.0493480345. The cubic root of 2128825 is about 128.6411717438.

The spelling of 2128825 in words is "two million, one hundred twenty-eight thousand, eight hundred twenty-five".