12381447 has 12 divisors (see below), whose sum is σ = 17876904. Its totient is φ = 7619040.

The previous prime is 12381443. The next prime is 12381451. The reversal of 12381447 is 74418321.

It is an interprime number because it is at equal distance from previous prime (12381443) and next prime (12381451).

It is not a de Polignac number, because 12381447 - 2² = 12381443 is a prime.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12381443) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11704 + ... + 12717.

It is an arithmetic number, because the mean of its divisors is an integer number (1489742).

Almost surely, 2^12381447 is an apocalyptic number.

12381447 is a deficient number, since it is larger than the sum of its proper divisors (5495457).

12381447 is a wasteful number, since it uses less digits than its factorization.

12381447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24450 (or 24437 counting only the distinct ones).

The product of its digits is 5376, while the sum is 30.

The square root of 12381447 is about 3518.7280372316. The cubic root of 12381447 is about 231.3434108139.

Adding to 12381447 its reverse (74418321), we get a palindrome (86799768).

The spelling of 12381447 in words is "twelve million, three hundred eighty-one thousand, four hundred forty-seven".