204500125 has 8 divisors (see below), whose sum is σ = 255216312. Its totient is φ = 163600000.

The previous prime is 204500117. The next prime is 204500171. The reversal of 204500125 is 521005402.

It can be written as a sum of positive squares in 4 ways, for example, as 5943844 + 198556281 = 2438^2 + 14091^2 .

It is not a de Polignac number, because 204500125 - 2³ = 204500117 is a prime.

It is a super-2 number, since 2×204500125² = 83640602250031250, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 817876 + ... + 818125.

It is an arithmetic number, because the mean of its divisors is an integer number (31902039).

Almost surely, 2^204500125 is an apocalyptic number.

204500125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

204500125 is a deficient number, since it is larger than the sum of its proper divisors (50716187).

204500125 is an equidigital number, since it uses as much as digits as its factorization.

204500125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1636016 (or 1636006 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 204500125 is about 14300.3540165969. The cubic root of 204500125 is about 589.1572042126.

Adding to 204500125 its reverse (521005402), we get a palindrome (725505527).

The spelling of 204500125 in words is "two hundred four million, five hundred thousand, one hundred twenty-five".