12547423417 has 4 divisors (see below), whose sum is σ = 12980093220. Its totient is φ = 12114753616.

The previous prime is 12547423367. The next prime is 12547423423. The reversal of 12547423417 is 71432474521.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4797086121 + 7750337296 = 69261^2 + 88036^2 .

It is a cyclic number.

It is not a de Polignac number, because 12547423417 - 2¹⁵ = 12547390649 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 12547423417.

It is not an unprimeable number, because it can be changed into a prime (12547423117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 216334858 + ... + 216334915.

It is an arithmetic number, because the mean of its divisors is an integer number (3245023305).

Almost surely, 2^12547423417 is an apocalyptic number.

It is an amenable number.

12547423417 is a deficient number, since it is larger than the sum of its proper divisors (432669803).

12547423417 is an equidigital number, since it uses as much as digits as its factorization.

12547423417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432669802.

The product of its digits is 188160, while the sum is 40.

Adding to 12547423417 its reverse (71432474521), we get a palindrome (83979897938).

The spelling of 12547423417 in words is "twelve billion, five hundred forty-seven million, four hundred twenty-three thousand, four hundred seventeen".