12389247 has 32 divisors (see below), whose sum is σ = 20213760. Its totient is φ = 7452000.

The previous prime is 12389239. The next prime is 12389263. The reversal of 12389247 is 74298321.

It is not a de Polignac number, because 12389247 - 2³ = 12389239 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12389147) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16122 + ... + 16872.

It is an arithmetic number, because the mean of its divisors is an integer number (631680).

Almost surely, 2^12389247 is an apocalyptic number.

12389247 is a deficient number, since it is larger than the sum of its proper divisors (7824513).

12389247 is a wasteful number, since it uses less digits than its factorization.

12389247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 820 (or 814 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 12389247 is about 3519.8362177806. The cubic root of 12389247 is about 231.3919807916.

The spelling of 12389247 in words is "twelve million, three hundred eighty-nine thousand, two hundred forty-seven".