13244421 has 4 divisors (see below), whose sum is σ = 17659232. Its totient is φ = 8829612.

The previous prime is 13244383. The next prime is 13244431. The reversal of 13244421 is 12444231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12444231 = 3 ⋅4148077.

It is not a de Polignac number, because 13244421 - 2⁷ = 13244293 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13244431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2207401 + ... + 2207406.

It is an arithmetic number, because the mean of its divisors is an integer number (4414808).

Almost surely, 2^13244421 is an apocalyptic number.

It is an amenable number.

13244421 is a deficient number, since it is larger than the sum of its proper divisors (4414811).

13244421 is an equidigital number, since it uses as much as digits as its factorization.

13244421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4414810.

The product of its digits is 768, while the sum is 21.

The square root of 13244421 is about 3639.2885293694. The cubic root of 13244421 is about 236.5979581895.

Adding to 13244421 its reverse (12444231), we get a palindrome (25688652).

The spelling of 13244421 in words is "thirteen million, two hundred forty-four thousand, four hundred twenty-one".