13421320 has 96 divisors (see below), whose sum is σ = 34473600. Its totient is φ = 4695680.

The previous prime is 13421299. The next prime is 13421323. The reversal of 13421320 is 2312431.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 13421294 and 13421303.

It is not an unprimeable number, because it can be changed into a prime (13421323) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 227451 + ... + 227509.

It is an arithmetic number, because the mean of its divisors is an integer number (359100).

Almost surely, 2^13421320 is an apocalyptic number.

13421320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13421320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17236800).

13421320 is an abundant number, since it is smaller than the sum of its proper divisors (21052280).

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

13421320 is a wasteful number, since it uses less digits than its factorization.

13421320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139 (or 124 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 13421320 is about 3663.5119762326. The cubic root of 13421320 is about 237.6466757866.

Adding to 13421320 its reverse (2312431), we get a palindrome (15733751).

Subtracting from 13421320 its reverse (2312431), we obtain a square (11108889 = 3333²).

It can be divided in two parts, 1342 and 1320, that added together give a palindrome (2662).

The spelling of 13421320 in words is "thirteen million, four hundred twenty-one thousand, three hundred twenty".