204105145 has 8 divisors (see below), whose sum is σ = 259333704. Its totient is φ = 153679104.

The previous prime is 204105137. The next prime is 204105157. The reversal of 204105145 is 541501402.

204105145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 27321529 + 176783616 = 5227^2 + 13296^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 204105145 - 2³ = 204105137 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1200534 + ... + 1200703.

It is an arithmetic number, because the mean of its divisors is an integer number (32416713).

Almost surely, 2^204105145 is an apocalyptic number.

It is an amenable number.

204105145 is a deficient number, since it is larger than the sum of its proper divisors (55228559).

204105145 is a wasteful number, since it uses less digits than its factorization.

204105145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2401259.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 204105145 is about 14286.5371941559. The cubic root of 204105145 is about 588.7776522158. Note that the first 3 decimals are identical.

Adding to 204105145 its reverse (541501402), we get a palindrome (745606547).

The spelling of 204105145 in words is "two hundred four million, one hundred five thousand, one hundred forty-five".