204512120 has 16 divisors (see below), whose sum is σ = 460152360. Its totient is φ = 81804832.

The previous prime is 204512071. The next prime is 204512149. The reversal of 204512120 is 21215402.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 2556362 + ... + 2556441.

Almost surely, 2^204512120 is an apocalyptic number.

204512120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204512120 is an abundant number, since it is smaller than the sum of its proper divisors (255640240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

204512120 is a wasteful number, since it uses less digits than its factorization.

204512120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5112814 (or 5112810 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 204512120 is about 14300.7734056589. The cubic root of 204512120 is about 589.1687230361.

Adding to 204512120 its reverse (21215402), we get a palindrome (225727522).

The spelling of 204512120 in words is "two hundred four million, five hundred twelve thousand, one hundred twenty".