13444421 has 8 divisors (see below), whose sum is σ = 14087424. Its totient is φ = 12814560.

The previous prime is 13444373. The next prime is 13444469. The reversal of 13444421 is 12444431.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (13444373) and next prime (13444469).

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13444421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13444471) 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 7 ways as a sum of consecutive naturals, for example, 1160 + ... + 5313.

It is an arithmetic number, because the mean of its divisors is an integer number (1760928).

Almost surely, 2^13444421 is an apocalyptic number.

It is an amenable number.

13444421 is a deficient number, since it is larger than the sum of its proper divisors (643003).

13444421 is an equidigital number, since it uses as much as digits as its factorization.

13444421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6571.

The product of its digits is 1536, while the sum is 23.

The square root of 13444421 is about 3666.6634696956. The cubic root of 13444421 is about 237.7829447754.

Adding to 13444421 its reverse (12444431), we get a palindrome (25888852).

The spelling of 13444421 in words is "thirteen million, four hundred forty-four thousand, four hundred twenty-one".