12006409 has 2 divisors, whose sum is σ = 12006410. Its totient is φ = 12006408.

The previous prime is 12006359. The next prime is 12006427. The reversal of 12006409 is 90460021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11868025 + 138384 = 3445^2 + 372^2 .

It is a cyclic number.

It is not a de Polignac number, because 12006409 - 2¹⁵ = 11973641 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12006409.

It is not a weakly prime, because it can be changed into another prime (12006109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6003204 + 6003205.

It is an arithmetic number, because the mean of its divisors is an integer number (6003205).

Almost surely, 2^12006409 is an apocalyptic number.

It is an amenable number.

12006409 is a deficient number, since it is larger than the sum of its proper divisors (1).

12006409 is an equidigital number, since it uses as much as digits as its factorization.

12006409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 12006409 is about 3465.0265511248. The cubic root of 12006409 is about 228.9835994433.

The spelling of 12006409 in words is "twelve million, six thousand, four hundred nine".