12447236 has 6 divisors (see below), whose sum is σ = 21782670. Its totient is φ = 6223616.

The previous prime is 12447221. The next prime is 12447269. The reversal of 12447236 is 63274421.

It can be written as a sum of positive squares in only one way, i.e., 11600836 + 846400 = 3406^2 + 920^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12447199 and 12447208.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1555901 + ... + 1555908.

It is an arithmetic number, because the mean of its divisors is an integer number (3630445).

Almost surely, 2^12447236 is an apocalyptic number.

It is an amenable number.

12447236 is a deficient number, since it is larger than the sum of its proper divisors (9335434).

12447236 is a wasteful number, since it uses less digits than its factorization.

12447236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3111813 (or 3111811 counting only the distinct ones).

The product of its digits is 8064, while the sum is 29.

The square root of 12447236 is about 3528.0640583754. The cubic root of 12447236 is about 231.7524360805.

The spelling of 12447236 in words is "twelve million, four hundred forty-seven thousand, two hundred thirty-six".