12321409 has 2 divisors, whose sum is σ = 12321410. Its totient is φ = 12321408.

The previous prime is 12321403. The next prime is 12321431. The reversal of 12321409 is 90412321.

It is an a-pointer prime, because the next prime (12321431) can be obtained adding 12321409 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6426225 + 5895184 = 2535^2 + 2428^2 .

It is a cyclic number.

It is not a de Polignac number, because 12321409 - 2³ = 12321401 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12321409.

It is not a weakly prime, because it can be changed into another prime (12321401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6160704 + 6160705.

It is an arithmetic number, because the mean of its divisors is an integer number (6160705).

Almost surely, 2^12321409 is an apocalyptic number.

It is an amenable number.

12321409 is a deficient number, since it is larger than the sum of its proper divisors (1).

12321409 is an equidigital number, since it uses as much as digits as its factorization.

12321409 is an evil number, because the sum of its binary digits is even.

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

The square root of 12321409 is about 3510.1864622837. The cubic root of 12321409 is about 230.9688744505.

The spelling of 12321409 in words is "twelve million, three hundred twenty-one thousand, four hundred nine".