12431071 has 2 divisors, whose sum is σ = 12431072. Its totient is φ = 12431070.

The previous prime is 12431057. The next prime is 12431099. The reversal of 12431071 is 17013421.

It is a weak prime.

It is an emirp because it is prime and its reverse (17013421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12431071 - 2⁹ = 12430559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12431971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6215535 + 6215536.

It is an arithmetic number, because the mean of its divisors is an integer number (6215536).

Almost surely, 2^12431071 is an apocalyptic number.

12431071 is a deficient number, since it is larger than the sum of its proper divisors (1).

12431071 is an equidigital number, since it uses as much as digits as its factorization.

12431071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 12431071 is about 3525.7723976457. The cubic root of 12431071 is about 231.6520683887.

Adding to 12431071 its reverse (17013421), we get a palindrome (29444492).

The spelling of 12431071 in words is "twelve million, four hundred thirty-one thousand, seventy-one".