104320421 has 4 divisors (see below), whose sum is σ = 104445600. Its totient is φ = 104195244.

The previous prime is 104320417. The next prime is 104320423. The reversal of 104320421 is 124023401.

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.

It is a cyclic number.

It is not a de Polignac number, because 104320421 - 2² = 104320417 is a prime.

It is a super-5 number, since 5×104320421⁵ (a number of 41 digits) contains 55555 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 104320421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (104320423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61331 + ... + 63008.

It is an arithmetic number, because the mean of its divisors is an integer number (26111400).

Almost surely, 2^104320421 is an apocalyptic number.

It is an amenable number.

104320421 is a deficient number, since it is larger than the sum of its proper divisors (125179).

104320421 is an equidigital number, since it uses as much as digits as its factorization.

104320421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125178.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 104320421 is about 10213.7368773628. The cubic root of 104320421 is about 470.7494020196.

Adding to 104320421 its reverse (124023401), we get a palindrome (228343822).

The spelling of 104320421 in words is "one hundred four million, three hundred twenty thousand, four hundred twenty-one".