12209747 has 6 divisors (see below), whose sum is σ = 13420764. Its totient is φ = 11099660.

The previous prime is 12209737. The next prime is 12209749. The reversal of 12209747 is 74790221.

It is not a de Polignac number, because 12209747 - 2⁶ = 12209683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12209749) by changing a digit.

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 in 5 ways as a sum of consecutive naturals, for example, 50333 + ... + 50574.

It is an arithmetic number, because the mean of its divisors is an integer number (2236794).

Almost surely, 2^12209747 is an apocalyptic number.

12209747 is a deficient number, since it is larger than the sum of its proper divisors (1211017).

12209747 is a wasteful number, since it uses less digits than its factorization.

12209747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100929 (or 100918 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 12209747 is about 3494.2448397329. The cubic root of 12209747 is about 230.2690424428.

Adding to 12209747 its reverse (74790221), we get a palindrome (86999968).

The spelling of 12209747 in words is "twelve million, two hundred nine thousand, seven hundred forty-seven".