1380009 has 8 divisors (see below), whose sum is σ = 1948320. Its totient is φ = 865856.

The previous prime is 1380007. The next prime is 1380013. The reversal of 1380009 is 9000831.

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 1380009 - 2¹ = 1380007 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1380007) 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, 13479 + ... + 13580.

It is an arithmetic number, because the mean of its divisors is an integer number (243540).

2^1380009 is an apocalyptic number.

It is an amenable number.

1380009 is a deficient number, since it is larger than the sum of its proper divisors (568311).

1380009 is a wasteful number, since it uses less digits than its factorization.

1380009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27079.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 1380009 is about 1174.7378430952. The cubic root of 1380009 is about 111.3338701812. Note that the first 3 decimals are identical.

The spelling of 1380009 in words is "one million, three hundred eighty thousand, nine".