12117447 has 24 divisors (see below), whose sum is σ = 19178640. Its totient is φ = 7338240.

The previous prime is 12117437. The next prime is 12117461. The reversal of 12117447 is 74471121.

12117447 is a `hidden beast` number, since 1 + 211 + 7 + 447 = 666.

It is not a de Polignac number, because 12117447 - 2⁷ = 12117319 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12117447.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12117437) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3072 + ... + 5802.

It is an arithmetic number, because the mean of its divisors is an integer number (799110).

Almost surely, 2^12117447 is an apocalyptic number.

12117447 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

12117447 is a deficient number, since it is larger than the sum of its proper divisors (7061193).

12117447 is a wasteful number, since it uses less digits than its factorization.

12117447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2783 (or 2780 counting only the distinct ones).

The product of its digits is 1568, while the sum is 27.

The square root of 12117447 is about 3481.0123527503. The cubic root of 12117447 is about 229.6873319171.

Adding to 12117447 its reverse (74471121), we get a palindrome (86588568).

The spelling of 12117447 in words is "twelve million, one hundred seventeen thousand, four hundred forty-seven".