12237409 has 2 divisors, whose sum is σ = 12237410. Its totient is φ = 12237408.

The previous prime is 12237397. The next prime is 12237419. The reversal of 12237409 is 90473221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7840000 + 4397409 = 2800^2 + 2097^2 .

It is a cyclic number.

It is not a de Polignac number, because 12237409 - 2⁵ = 12237377 is a prime.

It is not a weakly prime, because it can be changed into another prime (12237419) 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 as a sum of consecutive naturals, namely, 6118704 + 6118705.

It is an arithmetic number, because the mean of its divisors is an integer number (6118705).

Almost surely, 2^12237409 is an apocalyptic number.

It is an amenable number.

12237409 is a deficient number, since it is larger than the sum of its proper divisors (1).

12237409 is an equidigital number, since it uses as much as digits as its factorization.

12237409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 12237409 is about 3498.2008232804. The cubic root of 12237409 is about 230.4428079317.

The spelling of 12237409 in words is "twelve million, two hundred thirty-seven thousand, four hundred nine".