12444421 has 16 divisors (see below), whose sum is σ = 13970880. Its totient is φ = 10990080.

The previous prime is 12444413. The next prime is 12444437.

12444421 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 12444421 - 2³ = 12444413 is a prime.

It is a super-2 number, since 2×12444421² = 309727228050482, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12444392 and 12444401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12444521) 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 15 ways as a sum of consecutive naturals, for example, 114115 + ... + 114223.

It is an arithmetic number, because the mean of its divisors is an integer number (873180).

Almost surely, 2^12444421 is an apocalyptic number.

12444421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12444421 is a deficient number, since it is larger than the sum of its proper divisors (1526459).

12444421 is a wasteful number, since it uses less digits than its factorization.

12444421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324.

The product of its digits is 1024, while the sum is 22.

The square root of 12444421 is about 3527.6650918136. The cubic root of 12444421 is about 231.7349641349.

It can be divided in two parts, 1244 and 4421, that added together give a palindrome (5665).

The spelling of 12444421 in words is "twelve million, four hundred forty-four thousand, four hundred twenty-one".