204120625 has 10 divisors (see below), whose sum is σ = 255069914. Its totient is φ = 163296000.

The previous prime is 204120619. The next prime is 204120643. The reversal of 204120625 is 526021402.

It can be written as a sum of positive squares in 5 ways, for example, as 30118144 + 174002481 = 5488^2 + 13191^2 .

It is a de Polignac number, because none of the positive numbers 2^k-204120625 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 204120596 and 204120605.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 162672 + ... + 163921.

Almost surely, 2^204120625 is an apocalyptic number.

204120625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

204120625 is a deficient number, since it is larger than the sum of its proper divisors (50949289).

204120625 is an frugal number, since it uses more digits than its factorization.

204120625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326613 (or 326598 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 204120625 is about 14287.0789526761. The cubic root of 204120625 is about 588.7925367788.

The spelling of 204120625 in words is "two hundred four million, one hundred twenty thousand, six hundred twenty-five".