1320009 has 8 divisors (see below), whose sum is σ = 1768032. Its totient is φ = 876000.

The previous prime is 1319963. The next prime is 1320019. The reversal of 1320009 is 9000231.

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

It is not a de Polignac number, because 1320009 - 2¹¹ = 1317961 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1320009.

It is not an unprimeable number, because it can be changed into a prime (1320019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124 + ... + 1629.

It is an arithmetic number, because the mean of its divisors is an integer number (221004).

2^1320009 is an apocalyptic number.

It is an amenable number.

1320009 is a deficient number, since it is larger than the sum of its proper divisors (448023).

1320009 is a wasteful number, since it uses less digits than its factorization.

1320009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2007.

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 1320009 is about 1148.9164460482. The cubic root of 1320009 is about 109.6963803575.

The spelling of 1320009 in words is "one million, three hundred twenty thousand, nine".