12125309 has 16 divisors (see below), whose sum is σ = 14524416. Its totient is φ = 9903600.

The previous prime is 12125293. The next prime is 12125317. The reversal of 12125309 is 90352121.

12125309 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12125309 - 2⁴ = 12125293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12125339) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15014 + ... + 15800.

It is an arithmetic number, because the mean of its divisors is an integer number (907776).

Almost surely, 2^12125309 is an apocalyptic number.

It is an amenable number.

12125309 is a deficient number, since it is larger than the sum of its proper divisors (2399107).

12125309 is an equidigital number, since it uses as much as digits as its factorization.

12125309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 896.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 12125309 is about 3482.1414388275. The cubic root of 12125309 is about 229.7369961575.

The spelling of 12125309 in words is "twelve million, one hundred twenty-five thousand, three hundred nine".