4206409 has 2 divisors, whose sum is σ = 4206410. Its totient is φ = 4206408.

The previous prime is 4206383. The next prime is 4206413. The reversal of 4206409 is 9046024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3097600 + 1108809 = 1760^2 + 1053^2 .

It is a cyclic number.

It is not a de Polignac number, because 4206409 - 2⁷ = 4206281 is a prime.

4206409 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (4206439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2103204 + 2103205.

It is an arithmetic number, because the mean of its divisors is an integer number (2103205).

Almost surely, 2^4206409 is an apocalyptic number.

It is an amenable number.

4206409 is a deficient number, since it is larger than the sum of its proper divisors (1).

4206409 is an equidigital number, since it uses as much as digits as its factorization.

4206409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 4206409 is about 2050.9531930300. The cubic root of 4206409 is about 161.4248900704.

The spelling of 4206409 in words is "four million, two hundred six thousand, four hundred nine".