12440147 has 2 divisors, whose sum is σ = 12440148. Its totient is φ = 12440146.

The previous prime is 12440143. The next prime is 12440161. The reversal of 12440147 is 74104421.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12440147 - 2² = 12440143 is a prime.

It is a Chen prime.

It is equal to p₈₁₅₀₆₃ and since 12440147 and 815063 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (12440143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6220073 + 6220074.

It is an arithmetic number, because the mean of its divisors is an integer number (6220074).

Almost surely, 2^12440147 is an apocalyptic number.

12440147 is a deficient number, since it is larger than the sum of its proper divisors (1).

12440147 is an equidigital number, since it uses as much as digits as its factorization.

12440147 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 896, while the sum is 23.

The square root of 12440147 is about 3527.0592566613. The cubic root of 12440147 is about 231.7084315319.

Adding to 12440147 its reverse (74104421), we get a palindrome (86544568).

The spelling of 12440147 in words is "twelve million, four hundred forty thousand, one hundred forty-seven".