12181448 has 8 divisors (see below), whose sum is σ = 22840230. Its totient is φ = 6090720.

The previous prime is 12181447. The next prime is 12181457. The reversal of 12181448 is 84418121.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 11847364 + 334084 = 3442^2 + 578^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 12181448.

It is not an unprimeable number, because it can be changed into a prime (12181447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 761333 + ... + 761348.

Almost surely, 2^12181448 is an apocalyptic number.

It is an amenable number.

12181448 is a deficient number, since it is larger than the sum of its proper divisors (10658782).

12181448 is a wasteful number, since it uses less digits than its factorization.

12181448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1522687 (or 1522683 counting only the distinct ones).

The product of its digits is 2048, while the sum is 29.

The square root of 12181448 is about 3490.1931178661. The cubic root of 12181448 is about 230.0910036855.

Adding to 12181448 its reverse (84418121), we get a palindrome (96599569).

The spelling of 12181448 in words is "twelve million, one hundred eighty-one thousand, four hundred forty-eight".