12028409 has 2 divisors, whose sum is σ = 12028410. Its totient is φ = 12028408.

The previous prime is 12028399. The next prime is 12028421. The reversal of 12028409 is 90482021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11022400 + 1006009 = 3320^2 + 1003^2 .

It is a cyclic number.

It is not a de Polignac number, because 12028409 - 2²⁰ = 10979833 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12028109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6014204 + 6014205.

It is an arithmetic number, because the mean of its divisors is an integer number (6014205).

Almost surely, 2^12028409 is an apocalyptic number.

It is an amenable number.

12028409 is a deficient number, since it is larger than the sum of its proper divisors (1).

12028409 is an equidigital number, since it uses as much as digits as its factorization.

12028409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 12028409 is about 3468.1996770659. The cubic root of 12028409 is about 229.1233738311.

The spelling of 12028409 in words is "twelve million, twenty-eight thousand, four hundred nine".