4026409 has 2 divisors, whose sum is σ = 4026410. Its totient is φ = 4026408.

The previous prime is 4026401. The next prime is 4026437. The reversal of 4026409 is 9046204.

4026409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4012009 + 14400 = 2003^2 + 120^2 .

It is a cyclic number.

It is not a de Polignac number, because 4026409 - 2³ = 4026401 is a prime.

It is equal to p₂₈₄₉₀₂ and since 4026409 and 284902 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (4026401) 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, 2013204 + 2013205.

It is an arithmetic number, because the mean of its divisors is an integer number (2013205).

Almost surely, 2^4026409 is an apocalyptic number.

It is an amenable number.

4026409 is a deficient number, since it is larger than the sum of its proper divisors (1).

4026409 is an equidigital number, since it uses as much as digits as its factorization.

4026409 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 4026409 is about 2006.5913883997. The cubic root of 4026409 is about 159.0886864649.

The spelling of 4026409 in words is "four million, twenty-six thousand, four hundred nine".