1001009 has 4 divisors (see below), whose sum is σ = 1013760. Its totient is φ = 988260.

The previous prime is 1001003. The next prime is 1001017. The reversal of 1001009 is 9001001.

1001009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1001009 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1001003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6257 + ... + 6414.

It is an arithmetic number, because the mean of its divisors is an integer number (253440).

2^1001009 is an apocalyptic number.

It is an amenable number.

1001009 is a deficient number, since it is larger than the sum of its proper divisors (12751).

1001009 is an equidigital number, since it uses as much as digits as its factorization.

1001009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12750.

The product of its (nonzero) digits is 9, while the sum is 11.

The square root of 1001009 is about 1000.5043728040. The cubic root of 1001009 is about 100.0336220277.

The spelling of 1001009 in words is "one million, one thousand, nine".