12045409 has 2 divisors, whose sum is σ = 12045410. Its totient is φ = 12045408.

The previous prime is 12045347. The next prime is 12045427. The reversal of 12045409 is 90454021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9437184 + 2608225 = 3072^2 + 1615^2 .

It is a cyclic number.

It is not a de Polignac number, because 12045409 - 2⁹ = 12044897 is a prime.

It is not a weakly prime, because it can be changed into another prime (12055409) 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, 6022704 + 6022705.

It is an arithmetic number, because the mean of its divisors is an integer number (6022705).

Almost surely, 2^12045409 is an apocalyptic number.

It is an amenable number.

12045409 is a deficient number, since it is larger than the sum of its proper divisors (1).

12045409 is an equidigital number, since it uses as much as digits as its factorization.

12045409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 12045409 is about 3470.6496510020. The cubic root of 12045409 is about 229.2312646249.

The spelling of 12045409 in words is "twelve million, forty-five thousand, four hundred nine".