12440140247 has 2 divisors, whose sum is σ = 12440140248. Its totient is φ = 12440140246.

The previous prime is 12440140217. The next prime is 12440140267. The reversal of 12440140247 is 74204104421.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12440140247 - 2⁸ = 12440139991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12440140217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6220070123 + 6220070124.

It is an arithmetic number, because the mean of its divisors is an integer number (6220070124).

Almost surely, 2^12440140247 is an apocalyptic number.

12440140247 is a deficient number, since it is larger than the sum of its proper divisors (1).

12440140247 is an equidigital number, since it uses as much as digits as its factorization.

12440140247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7168, while the sum is 29.

Adding to 12440140247 its reverse (74204104421), we get a palindrome (86644244668).

The spelling of 12440140247 in words is "twelve billion, four hundred forty million, one hundred forty thousand, two hundred forty-seven".