12705009 has 16 divisors (see below), whose sum is σ = 17756160. Its totient is φ = 8070480.

The previous prime is 12704999. The next prime is 12705031. The reversal of 12705009 is 90050721.

It is not a de Polignac number, because 12705009 - 2¹² = 12700913 is a prime.

It is a super-2 number, since 2×12705009² = 322834507380162, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12705009.

It is not an unprimeable number, because it can be changed into a prime (12705109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5212 + ... + 7250.

It is an arithmetic number, because the mean of its divisors is an integer number (1109760).

Almost surely, 2^12705009 is an apocalyptic number.

It is an amenable number.

12705009 is a deficient number, since it is larger than the sum of its proper divisors (5051151).

12705009 is a wasteful number, since it uses less digits than its factorization.

12705009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2140.

The product of its (nonzero) digits is 630, while the sum is 24.

The square root of 12705009 is about 3564.4086466061. The cubic root of 12705009 is about 233.3413246696.

The spelling of 12705009 in words is "twelve million, seven hundred five thousand, nine".