13421304 has 72 divisors (see below), whose sum is σ = 39396240. Its totient is φ = 4125888.

The previous prime is 13421299. The next prime is 13421323. The reversal of 13421304 is 40312431.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

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 17 ways as a sum of consecutive naturals, for example, 11617 + ... + 12719.

It is an arithmetic number, because the mean of its divisors is an integer number (547170).

Almost surely, 2^13421304 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13421304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19698120).

13421304 is an abundant number, since it is smaller than the sum of its proper divisors (25974936).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13421304 is a wasteful number, since it uses less digits than its factorization.

13421304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1141 (or 1121 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 13421304 is about 3663.5097925350. The cubic root of 13421304 is about 237.6465813511.

Adding to 13421304 its reverse (40312431), we get a palindrome (53733735).

The spelling of 13421304 in words is "thirteen million, four hundred twenty-one thousand, three hundred four".