205104001 has 6 divisors (see below), whose sum is σ = 208642802. Its totient is φ = 201624240.

The previous prime is 205103981. The next prime is 205104007. The reversal of 205104001 is 100401502.

It can be written as a sum of positive squares in only one way, i.e., 154977601 + 50126400 = 12449^2 + 7080^2 .

It is not a de Polignac number, because 205104001 - 2¹³ = 205095809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205104007) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25980 + ... + 32941.

Almost surely, 2^205104001 is an apocalyptic number.

It is an amenable number.

205104001 is a deficient number, since it is larger than the sum of its proper divisors (3538801).

205104001 is an frugal number, since it uses more digits than its factorization.

205104001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59039 (or 58980 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 205104001 is about 14321.4524752205. The cubic root of 205104001 is about 589.7365490462.

Adding to 205104001 its reverse (100401502), we get a palindrome (305505503).

The spelling of 205104001 in words is "two hundred five million, one hundred four thousand, one".