12540041 has 2 divisors, whose sum is σ = 12540042. Its totient is φ = 12540040.

The previous prime is 12539993. The next prime is 12540043. The reversal of 12540041 is 14004521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10214416 + 2325625 = 3196^2 + 1525^2 .

It is a cyclic number.

It is not a de Polignac number, because 12540041 - 2²² = 8345737 is a prime.

Together with 12540043, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12540043) 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, 6270020 + 6270021.

It is an arithmetic number, because the mean of its divisors is an integer number (6270021).

Almost surely, 2^12540041 is an apocalyptic number.

It is an amenable number.

12540041 is a deficient number, since it is larger than the sum of its proper divisors (1).

12540041 is an equidigital number, since it uses as much as digits as its factorization.

12540041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 12540041 is about 3541.1920309410. The cubic root of 12540041 is about 232.3269826987.

Adding to 12540041 its reverse (14004521), we get a palindrome (26544562).

The spelling of 12540041 in words is "twelve million, five hundred forty thousand, forty-one".