12517541 has 2 divisors, whose sum is σ = 12517542. Its totient is φ = 12517540.

The previous prime is 12517517. The next prime is 12517579. The reversal of 12517541 is 14571521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12496225 + 21316 = 3535^2 + 146^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12517541 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12517541.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12517511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6258770 + 6258771.

It is an arithmetic number, because the mean of its divisors is an integer number (6258771).

Almost surely, 2^12517541 is an apocalyptic number.

It is an amenable number.

12517541 is a deficient number, since it is larger than the sum of its proper divisors (1).

12517541 is an equidigital number, since it uses as much as digits as its factorization.

12517541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1400, while the sum is 26.

The square root of 12517541 is about 3538.0137082832. The cubic root of 12517541 is about 232.1879484210.

The spelling of 12517541 in words is "twelve million, five hundred seventeen thousand, five hundred forty-one".