104017561 has 2 divisors, whose sum is σ = 104017562. Its totient is φ = 104017560.

The previous prime is 104017553. The next prime is 104017591. The reversal of 104017561 is 165710401.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58049161 + 45968400 = 7619^2 + 6780^2 .

It is an emirp because it is prime and its reverse (165710401) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 104017561 - 2³ = 104017553 is a prime.

It is not a weakly prime, because it can be changed into another prime (104017591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52008780 + 52008781.

It is an arithmetic number, because the mean of its divisors is an integer number (52008781).

Almost surely, 2^104017561 is an apocalyptic number.

It is an amenable number.

104017561 is a deficient number, since it is larger than the sum of its proper divisors (1).

104017561 is an equidigital number, since it uses as much as digits as its factorization.

104017561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 840, while the sum is 25.

The square root of 104017561 is about 10198.8999897048. The cubic root of 104017561 is about 470.2934051496.

Adding to 104017561 its reverse (165710401), we get a palindrome (269727962).

The spelling of 104017561 in words is "one hundred four million, seventeen thousand, five hundred sixty-one".