12128247 has 12 divisors (see below), whose sum is σ = 17548960. Its totient is φ = 8071488.

The previous prime is 12128243. The next prime is 12128257. The reversal of 12128247 is 74282121.

It is not a de Polignac number, because 12128247 - 2² = 12128243 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12128247.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12128243) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8703 + ... + 9999.

Almost surely, 2^12128247 is an apocalyptic number.

12128247 is a deficient number, since it is larger than the sum of its proper divisors (5420713).

12128247 is a wasteful number, since it uses less digits than its factorization.

12128247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2342 (or 2339 counting only the distinct ones).

The product of its digits is 1792, while the sum is 27.

The square root of 12128247 is about 3482.5632801142. The cubic root of 12128247 is about 229.7555499880.

The spelling of 12128247 in words is "twelve million, one hundred twenty-eight thousand, two hundred forty-seven".