12250709 has 4 divisors (see below), whose sum is σ = 12258540. Its totient is φ = 12242880.

The previous prime is 12250703. The next prime is 12250729. The reversal of 12250709 is 90705221.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 5244100 + 7006609 = 2290^2 + 2647^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12250709 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12250703) 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, 674 + ... + 4995.

It is an arithmetic number, because the mean of its divisors is an integer number (3064635).

Almost surely, 2^12250709 is an apocalyptic number.

It is an amenable number.

12250709 is a deficient number, since it is larger than the sum of its proper divisors (7831).

12250709 is an equidigital number, since it uses as much as digits as its factorization.

12250709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7830.

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 12250709 is about 3500.1012842488. The cubic root of 12250709 is about 230.5262618632.

The spelling of 12250709 in words is "twelve million, two hundred fifty thousand, seven hundred nine".