204771245 has 24 divisors (see below), whose sum is σ = 291942144. Its totient is φ = 137419296.

The previous prime is 204771223. The next prime is 204771247. The reversal of 204771245 is 542177402.

It is not a de Polignac number, because 204771245 - 2⁶ = 204771181 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204771247) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2624 + ... + 20406.

It is an arithmetic number, because the mean of its divisors is an integer number (12164256).

Almost surely, 2^204771245 is an apocalyptic number.

It is an amenable number.

204771245 is a deficient number, since it is larger than the sum of its proper divisors (87170899).

204771245 is a wasteful number, since it uses less digits than its factorization.

204771245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17849 (or 17842 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 32.

The square root of 204771245 is about 14309.8303623768. The cubic root of 204771245 is about 589.4174514272.

The spelling of 204771245 in words is "two hundred four million, seven hundred seventy-one thousand, two hundred forty-five".