561204601 has 2 divisors, whose sum is σ = 561204602. Its totient is φ = 561204600.

The previous prime is 561204587. The next prime is 561204619. The reversal of 561204601 is 106402165.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 395413225 + 165791376 = 19885^2 + 12876^2 .

It is a cyclic number.

It is not a de Polignac number, because 561204601 - 2⁵ = 561204569 is a prime.

It is not a weakly prime, because it can be changed into another prime (561204671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280602300 + 280602301.

It is an arithmetic number, because the mean of its divisors is an integer number (280602301).

Almost surely, 2^561204601 is an apocalyptic number.

It is an amenable number.

561204601 is a deficient number, since it is larger than the sum of its proper divisors (1).

561204601 is an equidigital number, since it uses as much as digits as its factorization.

561204601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 561204601 is about 23689.7573014162. The cubic root of 561204601 is about 824.8476491249.

Adding to 561204601 its reverse (106402165), we get a palindrome (667606766).

The spelling of 561204601 in words is "five hundred sixty-one million, two hundred four thousand, six hundred one".