2128325 has 6 divisors (see below), whose sum is σ = 2639154. Its totient is φ = 1702640.

The previous prime is 2128319. The next prime is 2128327. The reversal of 2128325 is 5238212.

It can be written as a sum of positive squares in 3 ways, for example, as 5476 + 2122849 = 74^2 + 1457^2 .

It is not a de Polignac number, because 2128325 - 2⁴ = 2128309 is a prime.

It is a d-powerful number, because it can be written as 2⁴ + 1 + 2¹³ + 8⁴ + 3¹³ + 2¹⁷ + 5⁸ .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2128325.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2128327) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 42542 + ... + 42591.

It is an arithmetic number, because the mean of its divisors is an integer number (439859).

2^2128325 is an apocalyptic number.

2128325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2128325 is a deficient number, since it is larger than the sum of its proper divisors (510829).

2128325 is an equidigital number, since it uses as much as digits as its factorization.

2128325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85143 (or 85138 counting only the distinct ones).

The product of its digits is 960, while the sum is 23.

The square root of 2128325 is about 1458.8779935279. The cubic root of 2128325 is about 128.6310995800.

The spelling of 2128325 in words is "two million, one hundred twenty-eight thousand, three hundred twenty-five".