1380305 has 8 divisors (see below), whose sum is σ = 1684800. Its totient is φ = 1085296.

The previous prime is 1380289. The next prime is 1380307. The reversal of 1380305 is 5030831.

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 1380305 - 2⁴ = 1380289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1380307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2045 + ... + 2634.

It is an arithmetic number, because the mean of its divisors is an integer number (210600).

2^1380305 is an apocalyptic number.

It is an amenable number.

1380305 is a deficient number, since it is larger than the sum of its proper divisors (304495).

1380305 is an equidigital number, since it uses as much as digits as its factorization.

1380305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4743.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 1380305 is about 1174.8638218960. The cubic root of 1380305 is about 111.3418296630.

The spelling of 1380305 in words is "one million, three hundred eighty thousand, three hundred five".