12985009 has 4 divisors (see below), whose sum is σ = 13197940. Its totient is φ = 12772080.

The previous prime is 12985003. The next prime is 12985013. The reversal of 12985009 is 90058921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90058921 = 67 ⋅1344163.

It can be written as a sum of positive squares in 2 ways, for example, as 3621409 + 9363600 = 1903^2 + 3060^2 .

It is a cyclic number.

It is not a de Polignac number, because 12985009 - 2⁹ = 12984497 is a prime.

It is a super-2 number, since 2×12985009² = 337220917460162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12985003) 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, 106374 + ... + 106495.

It is an arithmetic number, because the mean of its divisors is an integer number (3299485).

Almost surely, 2^12985009 is an apocalyptic number.

It is an amenable number.

12985009 is a deficient number, since it is larger than the sum of its proper divisors (212931).

12985009 is an equidigital number, since it uses as much as digits as its factorization.

12985009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212930.

The product of its (nonzero) digits is 6480, while the sum is 34.

The square root of 12985009 is about 3603.4717981413. The cubic root of 12985009 is about 235.0430523205.

The spelling of 12985009 in words is "twelve million, nine hundred eighty-five thousand, nine".