204401025 has 18 divisors (see below), whose sum is σ = 366105350. Its totient is φ = 109013760.

The previous prime is 204401009. The next prime is 204401033. The reversal of 204401025 is 520104402.

It can be written as a sum of positive squares in 3 ways, for example, as 3640464 + 200760561 = 1908^2 + 14169^2 .

It is not a de Polignac number, because 204401025 - 2⁴ = 204401009 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 204400989 and 204401007.

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 17 ways as a sum of consecutive naturals, for example, 454000 + ... + 454449.

Almost surely, 2^204401025 is an apocalyptic number.

204401025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

204401025 is a deficient number, since it is larger than the sum of its proper divisors (161704325).

204401025 is a wasteful number, since it uses less digits than its factorization.

204401025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 908465 (or 908457 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 204401025 is about 14296.8886475345. Note that the first 3 decimals coincide. The cubic root of 204401025 is about 589.0620210392.

Adding to 204401025 its reverse (520104402), we get a palindrome (724505427).

The spelling of 204401025 in words is "two hundred four million, four hundred one thousand, twenty-five".