1380909 has 8 divisors (see below), whose sum is σ = 1848672. Its totient is φ = 916880.

The previous prime is 1380889. The next prime is 1380913. The reversal of 1380909 is 9090831.

It is a happy number.

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 1380909 - 2⁷ = 1380781 is a prime.

1380909 is a modest number, since divided by 909 gives 138 as remainder.

It is a Curzon number.

1380909 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1380949) 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, 94 + ... + 1664.

It is an arithmetic number, because the mean of its divisors is an integer number (231084).

2^1380909 is an apocalyptic number.

It is an amenable number.

1380909 is a deficient number, since it is larger than the sum of its proper divisors (467763).

1380909 is a wasteful number, since it uses less digits than its factorization.

1380909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1867.

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 1380909 is about 1175.1208448496. The cubic root of 1380909 is about 111.3580677791.

The spelling of 1380909 in words is "one million, three hundred eighty thousand, nine hundred nine".