2128225 has 24 divisors (see below), whose sum is σ = 2946240. Its totient is φ = 1512000.

The previous prime is 2128201. The next prime is 2128241. The reversal of 2128225 is 5228212.

It is not a de Polignac number, because 2128225 - 2¹¹ = 2126177 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2128196 and 2128205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19471 + ... + 19579.

It is an arithmetic number, because the mean of its divisors is an integer number (122760).

2^2128225 is an apocalyptic number.

2128225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2128225 is a deficient number, since it is larger than the sum of its proper divisors (818015).

2128225 is a wasteful number, since it uses less digits than its factorization.

2128225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201 (or 196 counting only the distinct ones).

The product of its digits is 640, while the sum is 22.

The square root of 2128225 is about 1458.8437202113. The cubic root of 2128225 is about 128.6290849580.

The spelling of 2128225 in words is "two million, one hundred twenty-eight thousand, two hundred twenty-five".