1004909 has 4 divisors (see below), whose sum is σ = 1013916. Its totient is φ = 995904.

The previous prime is 1004903. The next prime is 1004911. The reversal of 1004909 is 9094001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9094001 = 7 ⋅1299143.

It can be written as a sum of positive squares in 2 ways, for example, as 64009 + 940900 = 253^2 + 970^2 .

It is a cyclic number.

It is not a de Polignac number, because 1004909 - 2¹⁶ = 939373 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1004903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4334 + ... + 4559.

It is an arithmetic number, because the mean of its divisors is an integer number (253479).

2^1004909 is an apocalyptic number.

It is an amenable number.

1004909 is a deficient number, since it is larger than the sum of its proper divisors (9007).

1004909 is an equidigital number, since it uses as much as digits as its factorization.

1004909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9006.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 1004909 is about 1002.4514950859. The cubic root of 1004909 is about 100.1633663025.

The spelling of 1004909 in words is "one million, four thousand, nine hundred nine".