12543107 has 2 divisors, whose sum is σ = 12543108. Its totient is φ = 12543106.

The previous prime is 12543103. The next prime is 12543121. The reversal of 12543107 is 70134521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12543107 - 2² = 12543103 is a prime.

It is not a weakly prime, because it can be changed into another prime (12543103) 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, 6271553 + 6271554.

It is an arithmetic number, because the mean of its divisors is an integer number (6271554).

Almost surely, 2^12543107 is an apocalyptic number.

12543107 is a deficient number, since it is larger than the sum of its proper divisors (1).

12543107 is an equidigital number, since it uses as much as digits as its factorization.

12543107 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 12543107 is about 3541.6249095578. The cubic root of 12543107 is about 232.3459155577.

Adding to 12543107 its reverse (70134521), we get a palindrome (82677628).

The spelling of 12543107 in words is "twelve million, five hundred forty-three thousand, one hundred seven".