12745009 has 2 divisors, whose sum is σ = 12745010. Its totient is φ = 12745008.

The previous prime is 12744961. The next prime is 12745021. The reversal of 12745009 is 90054721.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12215025 + 529984 = 3495^2 + 728^2 .

It is a cyclic number.

It is not a de Polignac number, because 12745009 - 2¹³ = 12736817 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12745039) 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, 6372504 + 6372505.

It is an arithmetic number, because the mean of its divisors is an integer number (6372505).

Almost surely, 2^12745009 is an apocalyptic number.

It is an amenable number.

12745009 is a deficient number, since it is larger than the sum of its proper divisors (1).

12745009 is an equidigital number, since it uses as much as digits as its factorization.

12745009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 12745009 is about 3570.0152660738. The cubic root of 12745009 is about 233.5859493117.

The spelling of 12745009 in words is "twelve million, seven hundred forty-five thousand, nine".