13104421 has 6 divisors (see below), whose sum is σ = 14404166. Its totient is φ = 11913000.

The previous prime is 13104389. The next prime is 13104437. The reversal of 13104421 is 12440131.

It can be written as a sum of positive squares in only one way, i.e., 12859396 + 245025 = 3586^2 + 495^2 .

It is not a de Polignac number, because 13104421 - 2⁵ = 13104389 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13104395 and 13104404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13104451) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 54030 + ... + 54271.

Almost surely, 2^13104421 is an apocalyptic number.

13104421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13104421 is a deficient number, since it is larger than the sum of its proper divisors (1299745).

13104421 is a wasteful number, since it uses less digits than its factorization.

13104421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108323 (or 108312 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 13104421 is about 3620.0029005513. The cubic root of 13104421 is about 235.7613514482.

Adding to 13104421 its reverse (12440131), we get a palindrome (25544552).

The spelling of 13104421 in words is "thirteen million, one hundred four thousand, four hundred twenty-one".