205025125 has 8 divisors (see below), whose sum is σ = 255871512. Its totient is φ = 164020000.

The previous prime is 205025111. The next prime is 205025129. The reversal of 205025125 is 521520502.

It can be written as a sum of positive squares in 4 ways, for example, as 57183844 + 147841281 = 7562^2 + 12159^2 .

It is not a de Polignac number, because 205025125 - 2⁹ = 205024613 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 205025096 and 205025105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205025129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 819976 + ... + 820225.

It is an arithmetic number, because the mean of its divisors is an integer number (31983939).

Almost surely, 2^205025125 is an apocalyptic number.

205025125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

205025125 is a deficient number, since it is larger than the sum of its proper divisors (50846387).

205025125 is an equidigital number, since it uses as much as digits as its factorization.

205025125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1640216 (or 1640206 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 205025125 is about 14318.6984394532. The cubic root of 205025125 is about 589.6609418357.

Adding to 205025125 its reverse (521520502), we get a palindrome (726545627).

The spelling of 205025125 in words is "two hundred five million, twenty-five thousand, one hundred twenty-five".