1405009 has 2 divisors, whose sum is σ = 1405010. Its totient is φ = 1405008.

The previous prime is 1405007. The next prime is 1405039. The reversal of 1405009 is 9005041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1404225 + 784 = 1185^2 + 28^2 .

It is an emirp because it is prime and its reverse (9005041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1405009 - 2¹ = 1405007 is a prime.

Together with 1405007, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1405007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 702504 + 702505.

It is an arithmetic number, because the mean of its divisors is an integer number (702505).

2^1405009 is an apocalyptic number.

It is an amenable number.

1405009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1405009 is an equidigital number, since it uses as much as digits as its factorization.

1405009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 1405009 is about 1185.3307555278. The cubic root of 1405009 is about 112.0021523821.

The spelling of 1405009 in words is "one million, four hundred five thousand, nine".