12517009 has 4 divisors (see below), whose sum is σ = 12948660. Its totient is φ = 12085360.

The previous prime is 12516983. The next prime is 12517019. The reversal of 12517009 is 90071521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5626384 + 6890625 = 2372^2 + 2625^2 .

It is a cyclic number.

It is not a de Polignac number, because 12517009 - 2¹³ = 12508817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12517019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 215782 + ... + 215839.

It is an arithmetic number, because the mean of its divisors is an integer number (3237165).

Almost surely, 2^12517009 is an apocalyptic number.

It is an amenable number.

12517009 is a deficient number, since it is larger than the sum of its proper divisors (431651).

12517009 is an equidigital number, since it uses as much as digits as its factorization.

12517009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431650.

The product of its (nonzero) digits is 630, while the sum is 25.

The square root of 12517009 is about 3537.9385240561. The cubic root of 12517009 is about 232.1846590172.

The spelling of 12517009 in words is "twelve million, five hundred seventeen thousand, nine".