104405221 has 4 divisors (see below), whose sum is σ = 106116844. Its totient is φ = 102693600.

The previous prime is 104405201. The next prime is 104405237. The reversal of 104405221 is 122504401.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122504401 = 5591 ⋅21911.

It can be written as a sum of positive squares in 2 ways, for example, as 29582721 + 74822500 = 5439^2 + 8650^2 .

It is a cyclic number.

It is not a de Polignac number, because 104405221 - 2⁹ = 104404709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (104405201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 855720 + ... + 855841.

It is an arithmetic number, because the mean of its divisors is an integer number (26529211).

Almost surely, 2^104405221 is an apocalyptic number.

It is an amenable number.

104405221 is a deficient number, since it is larger than the sum of its proper divisors (1711623).

104405221 is an equidigital number, since it uses as much as digits as its factorization.

104405221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1711622.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 104405221 is about 10217.8873060922. The cubic root of 104405221 is about 470.8769217553.

Adding to 104405221 its reverse (122504401), we get a palindrome (226909622).

The spelling of 104405221 in words is "one hundred four million, four hundred five thousand, two hundred twenty-one".