404212205 has 4 divisors (see below), whose sum is σ = 485054652. Its totient is φ = 323369760.

The previous prime is 404212177. The next prime is 404212223. The reversal of 404212205 is 502212404.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 138815524 + 265396681 = 11782^2 + 16291^2 .

It is not a de Polignac number, because 404212205 - 2¹⁸ = 403950061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40421216 + ... + 40421225.

It is an arithmetic number, because the mean of its divisors is an integer number (121263663).

Almost surely, 2^404212205 is an apocalyptic number.

It is an amenable number.

404212205 is a deficient number, since it is larger than the sum of its proper divisors (80842447).

404212205 is an equidigital number, since it uses as much as digits as its factorization.

404212205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80842446.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 404212205 is about 20105.0293459124. The cubic root of 404212205 is about 739.3835900416.

Adding to 404212205 its reverse (502212404), we get a palindrome (906424609).

The spelling of 404212205 in words is "four hundred four million, two hundred twelve thousand, two hundred five".