13224621 has 8 divisors (see below), whose sum is σ = 17658144. Its totient is φ = 8803760.

The previous prime is 13224619. The next prime is 13224641. The reversal of 13224621 is 12642231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13224621 - 2¹ = 13224619 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13224611) 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 7 ways as a sum of consecutive naturals, for example, 375 + ... + 5156.

It is an arithmetic number, because the mean of its divisors is an integer number (2207268).

Almost surely, 2^13224621 is an apocalyptic number.

It is an amenable number.

13224621 is a deficient number, since it is larger than the sum of its proper divisors (4433523).

13224621 is an equidigital number, since it uses as much as digits as its factorization.

13224621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6331.

The product of its digits is 576, while the sum is 21.

The square root of 13224621 is about 3636.5671999841. The cubic root of 13224621 is about 236.4799971759.

Adding to 13224621 its reverse (12642231), we get a palindrome (25866852).

It can be divided in two parts, 132 and 24621, that added together give a triangular number (24753 = T₂₂₂).

The spelling of 13224621 in words is "thirteen million, two hundred twenty-four thousand, six hundred twenty-one".