204412345 has 4 divisors (see below), whose sum is σ = 245294820. Its totient is φ = 163529872.

The previous prime is 204412343. The next prime is 204412349. The reversal of 204412345 is 543214402.

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 154554624 + 49857721 = 12432^2 + 7061^2 .

It is a cyclic number.

It is not a de Polignac number, because 204412345 - 2¹ = 204412343 is a prime.

It is not an unprimeable number, because it can be changed into a prime (204412343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20441230 + ... + 20441239.

It is an arithmetic number, because the mean of its divisors is an integer number (61323705).

Almost surely, 2^204412345 is an apocalyptic number.

It is an amenable number.

204412345 is a deficient number, since it is larger than the sum of its proper divisors (40882475).

204412345 is an equidigital number, since it uses as much as digits as its factorization.

204412345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40882474.

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 204412345 is about 14297.2845323859. The cubic root of 204412345 is about 589.0728951839.

Adding to 204412345 its reverse (543214402), we get a palindrome (747626747).

The spelling of 204412345 in words is "two hundred four million, four hundred twelve thousand, three hundred forty-five".