12245709 has 32 divisors (see below), whose sum is σ = 20090880. Its totient is φ = 6478272.

The previous prime is 12245707. The next prime is 12245719. The reversal of 12245709 is 90754221.

12245709 = T₁₈₆₇ + T₁₈₆₈ + ... + T₁₈₇₃.

12245709 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12245709 - 2¹ = 12245707 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12245707) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18427 + ... + 19079.

It is an arithmetic number, because the mean of its divisors is an integer number (627840).

Almost surely, 2^12245709 is an apocalyptic number.

12245709 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

12245709 is a deficient number, since it is larger than the sum of its proper divisors (7845171).

12245709 is a wasteful number, since it uses less digits than its factorization.

12245709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 729.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 12245709 is about 3499.3869463093. The cubic root of 12245709 is about 230.4948952934.

The spelling of 12245709 in words is "twelve million, two hundred forty-five thousand, seven hundred nine".