205004145 has 8 divisors (see below), whose sum is σ = 328006656. Its totient is φ = 109335536.

The previous prime is 205004119. The next prime is 205004179. The reversal of 205004145 is 541400502.

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 205004145 - 2⁶ = 205004081 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 6833457 + ... + 6833486.

It is an arithmetic number, because the mean of its divisors is an integer number (41000832).

Almost surely, 2^205004145 is an apocalyptic number.

It is an amenable number.

205004145 is a deficient number, since it is larger than the sum of its proper divisors (123002511).

205004145 is a wasteful number, since it uses less digits than its factorization.

205004145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13666951.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 205004145 is about 14317.9658122235. The cubic root of 205004145 is about 589.6408280268.

Adding to 205004145 its reverse (541400502), we get a palindrome (746404647).

The spelling of 205004145 in words is "two hundred five million, four thousand, one hundred forty-five".