1002009 has 8 divisors (see below), whose sum is σ = 1340640. Its totient is φ = 665696.

The previous prime is 1001989. The next prime is 1002017. The reversal of 1002009 is 9002001.

It is a happy number.

1002009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1002009 - 2⁵ = 1001977 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1001985 and 1002003.

It is not an unprimeable number, because it can be changed into a prime (1002049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1414 + ... + 2000.

It is an arithmetic number, because the mean of its divisors is an integer number (167580).

2^1002009 is an apocalyptic number.

It is an amenable number.

1002009 is a deficient number, since it is larger than the sum of its proper divisors (338631).

1002009 is an equidigital number, since it uses as much as digits as its factorization.

1002009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1159.

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 1002009 is about 1001.0039959960. The cubic root of 1002009 is about 100.0669218713.

The spelling of 1002009 in words is "one million, two thousand, nine".