104004561 has 16 divisors (see below), whose sum is σ = 143345664. Its totient is φ = 67035984.

The previous prime is 104004557. The next prime is 104004587. The reversal of 104004561 is 165400401.

It is not a de Polignac number, because 104004561 - 2² = 104004557 is a prime.

It is not an unprimeable number, because it can be changed into a prime (104003561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7260 + ... + 16146.

It is an arithmetic number, because the mean of its divisors is an integer number (8959104).

Almost surely, 2^104004561 is an apocalyptic number.

It is an amenable number.

104004561 is a deficient number, since it is larger than the sum of its proper divisors (39341103).

104004561 is an equidigital number, since it uses as much as digits as its factorization.

104004561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9020.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 104004561 is about 10198.2626461569. The cubic root of 104004561 is about 470.2738120831.

Adding to 104004561 its reverse (165400401), we get a palindrome (269404962).

The spelling of 104004561 in words is "one hundred four million, four thousand, five hundred sixty-one".