13621120 has 32 divisors (see below), whose sum is σ = 32564520. Its totient is φ = 5448192.

The previous prime is 13621109. The next prime is 13621123. The reversal of 13621120 is 2112631.

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 13621094 and 13621103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13621123) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 10002 + ... + 11281.

Almost surely, 2^13621120 is an apocalyptic number.

13621120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13621120 is an abundant number, since it is smaller than the sum of its proper divisors (18943400).

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

13621120 is an equidigital number, since it uses as much as digits as its factorization.

13621120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21302 (or 21290 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 13621120 is about 3690.6801541179. The cubic root of 13621120 is about 238.8201350926.

Adding to 13621120 its reverse (2112631), we get a palindrome (15733751).

The spelling of 13621120 in words is "thirteen million, six hundred twenty-one thousand, one hundred twenty".