12440137 has 2 divisors, whose sum is σ = 12440138. Its totient is φ = 12440136.

The previous prime is 12440119. The next prime is 12440143. The reversal of 12440137 is 73104421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12243001 + 197136 = 3499^2 + 444^2 .

It is a cyclic number.

It is not a de Polignac number, because 12440137 - 2⁷ = 12440009 is a prime.

It is not a weakly prime, because it can be changed into another prime (12440147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6220068 + 6220069.

It is an arithmetic number, because the mean of its divisors is an integer number (6220069).

Almost surely, 2^12440137 is an apocalyptic number.

It is an amenable number.

12440137 is a deficient number, since it is larger than the sum of its proper divisors (1).

12440137 is an equidigital number, since it uses as much as digits as its factorization.

12440137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 12440137 is about 3527.0578390494. The cubic root of 12440137 is about 231.7083694457.

Adding to 12440137 its reverse (73104421), we get a palindrome (85544558).

The spelling of 12440137 in words is "twelve million, four hundred forty thousand, one hundred thirty-seven".