561127601 has 4 divisors (see below), whose sum is σ = 561183012. Its totient is φ = 561072192.

The previous prime is 561127561. The next prime is 561127643. The reversal of 561127601 is 106721165.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 71656225 + 489471376 = 8465^2 + 22124^2 .

It is a cyclic number.

It is not a de Polignac number, because 561127601 - 2⁶ = 561127537 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (561127201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7700 + ... + 34373.

It is an arithmetic number, because the mean of its divisors is an integer number (140295753).

Almost surely, 2^561127601 is an apocalyptic number.

It is an amenable number.

561127601 is a deficient number, since it is larger than the sum of its proper divisors (55411).

561127601 is a wasteful number, since it uses less digits than its factorization.

561127601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55410.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 561127601 is about 23688.1320707227. The cubic root of 561127601 is about 824.8099230300.

Adding to 561127601 its reverse (106721165), we get a palindrome (667848766).

The spelling of 561127601 in words is "five hundred sixty-one million, one hundred twenty-seven thousand, six hundred one".