12750209 has 2 divisors, whose sum is σ = 12750210. Its totient is φ = 12750208.

The previous prime is 12750193. The next prime is 12750223. The reversal of 12750209 is 90205721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12567025 + 183184 = 3545^2 + 428^2 .

It is an emirp because it is prime and its reverse (90205721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12750209 - 2⁴ = 12750193 is a prime.

It is not a weakly prime, because it can be changed into another prime (12750239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6375104 + 6375105.

It is an arithmetic number, because the mean of its divisors is an integer number (6375105).

Almost surely, 2^12750209 is an apocalyptic number.

It is an amenable number.

12750209 is a deficient number, since it is larger than the sum of its proper divisors (1).

12750209 is an equidigital number, since it uses as much as digits as its factorization.

12750209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 12750209 is about 3570.7434800052. The cubic root of 12750209 is about 233.6177129032.

The spelling of 12750209 in words is "twelve million, seven hundred fifty thousand, two hundred nine".