104421 has 4 divisors (see below), whose sum is σ = 139232. Its totient is φ = 69612.

The previous prime is 104417. The next prime is 104459. The reversal of 104421 is 124401.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 124401 = 3 ⋅41467.

It is not a de Polignac number, because 104421 - 2² = 104417 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 104397 and 104406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (104471) 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, 17401 + ... + 17406.

It is an arithmetic number, because the mean of its divisors is an integer number (34808).

2¹⁰⁴⁴²¹ is an apocalyptic number.

It is an amenable number.

104421 is a deficient number, since it is larger than the sum of its proper divisors (34811).

104421 is an equidigital number, since it uses as much as digits as its factorization.

104421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34810.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 104421 is about 323.1423834782. The cubic root of 104421 is about 47.0900642129.

Adding to 104421 its reverse (124401), we get a palindrome (228822).

It can be divided in two parts, 104 and 421, that added together give a palindrome (525).

The spelling of 104421 in words is "one hundred four thousand, four hundred twenty-one", and thus it is an iban number.