1380785 has 8 divisors (see below), whose sum is σ = 1893696. Its totient is φ = 946800.

The previous prime is 1380781. The next prime is 1380793. The reversal of 1380785 is 5870831.

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

It is not a de Polignac number, because 1380785 - 2² = 1380781 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1380781) 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, 19691 + ... + 19760.

It is an arithmetic number, because the mean of its divisors is an integer number (236712).

2^1380785 is an apocalyptic number.

It is an amenable number.

1380785 is a deficient number, since it is larger than the sum of its proper divisors (512911).

1380785 is an equidigital number, since it uses as much as digits as its factorization.

1380785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39463.

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 1380785 is about 1175.0680831339. The cubic root of 1380785 is about 111.3547345124.

The spelling of 1380785 in words is "one million, three hundred eighty thousand, seven hundred eighty-five".