102044561 has 2 divisors, whose sum is σ = 102044562. Its totient is φ = 102044560.

The previous prime is 102044543. The next prime is 102044597. The reversal of 102044561 is 165440201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 96432400 + 5612161 = 9820^2 + 2369^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102044561 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (102044161) 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 as a sum of consecutive naturals, namely, 51022280 + 51022281.

It is an arithmetic number, because the mean of its divisors is an integer number (51022281).

Almost surely, 2^102044561 is an apocalyptic number.

It is an amenable number.

102044561 is a deficient number, since it is larger than the sum of its proper divisors (1).

102044561 is an equidigital number, since it uses as much as digits as its factorization.

102044561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 102044561 is about 10101.7107957019. The cubic root of 102044561 is about 467.3009033350.

Adding to 102044561 its reverse (165440201), we get a palindrome (267484762).

The spelling of 102044561 in words is "one hundred two million, forty-four thousand, five hundred sixty-one".