1380985 has 8 divisors (see below), whose sum is σ = 1667520. Its totient is φ = 1097904.

The previous prime is 1380983. The next prime is 1380997. The reversal of 1380985 is 5890831.

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 1380985 - 2¹ = 1380983 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1380985.

It is not an unprimeable number, because it can be changed into a prime (1380983) 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, 124 + ... + 1666.

It is an arithmetic number, because the mean of its divisors is an integer number (208440).

2^1380985 is an apocalyptic number.

It is an amenable number.

1380985 is a deficient number, since it is larger than the sum of its proper divisors (286535).

1380985 is a wasteful number, since it uses less digits than its factorization.

1380985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1727.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 1380985 is about 1175.1531815044. The cubic root of 1380985 is about 111.3601106503.

The spelling of 1380985 in words is "one million, three hundred eighty thousand, nine hundred eighty-five".