13421144 has 64 divisors (see below), whose sum is σ = 30240000. Its totient is φ = 5512320.

The previous prime is 13421141. The next prime is 13421173. The reversal of 13421144 is 44112431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13421141) 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 15 ways as a sum of consecutive naturals, for example, 38282 + ... + 38630.

It is an arithmetic number, because the mean of its divisors is an integer number (472500).

Almost surely, 2^13421144 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 13421144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15120000).

13421144 is an abundant number, since it is smaller than the sum of its proper divisors (16818856).

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

13421144 is a wasteful number, since it uses less digits than its factorization.

13421144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408 (or 404 counting only the distinct ones).

The product of its digits is 384, while the sum is 20.

The square root of 13421144 is about 3663.4879554872. The cubic root of 13421144 is about 237.6456369917.

Adding to 13421144 its reverse (44112431), we get a palindrome (57533575).

The spelling of 13421144 in words is "thirteen million, four hundred twenty-one thousand, one hundred forty-four".