12444381 has 8 divisors (see below), whose sum is σ = 18436160. Its totient is φ = 8296236.

The previous prime is 12444343. The next prime is 12444389. The reversal of 12444381 is 18344421.

It is not a de Polignac number, because 12444381 - 2¹³ = 12436189 is a prime.

It is a super-2 number, since 2×12444381² = 309725236946322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 460903 = 12444381 / (1 + 2 + 4 + 4 + 4 + 3 + 8 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12444389) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 230425 + ... + 230478.

It is an arithmetic number, because the mean of its divisors is an integer number (2304520).

Almost surely, 2^12444381 is an apocalyptic number.

It is an amenable number.

12444381 is a deficient number, since it is larger than the sum of its proper divisors (5991779).

12444381 is an equidigital number, since it uses as much as digits as its factorization.

12444381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460912 (or 460906 counting only the distinct ones).

The product of its digits is 3072, while the sum is 27.

The square root of 12444381 is about 3527.6594223366. The cubic root of 12444381 is about 231.7347158467.

It can be divided in two parts, 1244 and 4381, that added together give a square (5625 = 75²).

The spelling of 12444381 in words is "twelve million, four hundred forty-four thousand, three hundred eighty-one".