12175309 has 2 divisors, whose sum is σ = 12175310. Its totient is φ = 12175308.

The previous prime is 12175297. The next prime is 12175337. The reversal of 12175309 is 90357121.

It is an a-pointer prime, because the next prime (12175337) can be obtained adding 12175309 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6400900 + 5774409 = 2530^2 + 2403^2 .

It is an emirp because it is prime and its reverse (90357121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12175309 - 2¹⁵ = 12142541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12175609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6087654 + 6087655.

It is an arithmetic number, because the mean of its divisors is an integer number (6087655).

Almost surely, 2^12175309 is an apocalyptic number.

It is an amenable number.

12175309 is a deficient number, since it is larger than the sum of its proper divisors (1).

12175309 is an equidigital number, since it uses as much as digits as its factorization.

12175309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1890, while the sum is 28.

The square root of 12175309 is about 3489.3135428047. The cubic root of 12175309 is about 230.0523447339.

The spelling of 12175309 in words is "twelve million, one hundred seventy-five thousand, three hundred nine".