12450509 has 2 divisors, whose sum is σ = 12450510. Its totient is φ = 12450508.

The previous prime is 12450481. The next prime is 12450517. The reversal of 12450509 is 90505421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12096484 + 354025 = 3478^2 + 595^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12450509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12450539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6225254 + 6225255.

It is an arithmetic number, because the mean of its divisors is an integer number (6225255).

Almost surely, 2^12450509 is an apocalyptic number.

It is an amenable number.

12450509 is a deficient number, since it is larger than the sum of its proper divisors (1).

12450509 is an equidigital number, since it uses as much as digits as its factorization.

12450509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 12450509 is about 3528.5278800089. The cubic root of 12450509 is about 231.7727473970.

The spelling of 12450509 in words is "twelve million, four hundred fifty thousand, five hundred nine".