12447284 has 6 divisors (see below), whose sum is σ = 21782754. Its totient is φ = 6223640.

The previous prime is 12447283. The next prime is 12447287. The reversal of 12447284 is 48274421.

It can be written as a sum of positive squares in only one way, i.e., 9796900 + 2650384 = 3130^2 + 1628^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12447284.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12447283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1555907 + ... + 1555914.

It is an arithmetic number, because the mean of its divisors is an integer number (3630459).

Almost surely, 2^12447284 is an apocalyptic number.

It is an amenable number.

12447284 is a deficient number, since it is larger than the sum of its proper divisors (9335470).

12447284 is a wasteful number, since it uses less digits than its factorization.

12447284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3111825 (or 3111823 counting only the distinct ones).

The product of its digits is 14336, while the sum is 32.

The square root of 12447284 is about 3528.0708609664. The cubic root of 12447284 is about 231.7527339808.

The spelling of 12447284 in words is "twelve million, four hundred forty-seven thousand, two hundred eighty-four".