404211025 has 9 divisors (see below), whose sum is σ = 501346353. Its totient is φ = 323288400.

The previous prime is 404211013. The next prime is 404211029. The reversal of 404211025 is 520112404.

The square root of 404211025 is 20105.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 160351569 + 243859456 = 12663^2 + 15616^2 .

It is a de Polignac number, because none of the positive numbers 2^k-404211025 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 404210993 and 404211011.

It is not an unprimeable number, because it can be changed into a prime (404211029) by changing a digit.

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 8 ways as a sum of consecutive naturals, for example, 98515 + ... + 102535.

Almost surely, 2^404211025 is an apocalyptic number.

404211025 is the 20105-th square number.

404211025 is the 10053-rd centered octagonal number.

It is an amenable number.

404211025 is a deficient number, since it is larger than the sum of its proper divisors (97135328).

404211025 is an frugal number, since it uses more digits than its factorization.

404211025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8052 (or 4026 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The cubic root of 404211025 is about 739.3828705569.

Adding to 404211025 its reverse (520112404), we get a palindrome (924323429).

The spelling of 404211025 in words is "four hundred four million, two hundred eleven thousand, twenty-five".