12443381 has 4 divisors (see below), whose sum is σ = 12452064. Its totient is φ = 12434700.

The previous prime is 12443363. The next prime is 12443399. The reversal of 12443381 is 18334421.

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 a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (12443363) and next prime (12443399).

It is a cyclic number.

It is not a de Polignac number, because 12443381 - 2⁶ = 12443317 is a prime.

It is a super-2 number, since 2×12443381² = 309675461422322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12443381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12443311) 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, 1625 + ... + 5246.

It is an arithmetic number, because the mean of its divisors is an integer number (3113016).

Almost surely, 2^12443381 is an apocalyptic number.

It is an amenable number.

12443381 is a deficient number, since it is larger than the sum of its proper divisors (8683).

12443381 is an equidigital number, since it uses as much as digits as its factorization.

12443381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8682.

The product of its digits is 2304, while the sum is 26.

The square root of 12443381 is about 3527.5176824504. The cubic root of 12443381 is about 231.7285084689.

The spelling of 12443381 in words is "twelve million, four hundred forty-three thousand, three hundred eighty-one".