1366705 has 8 divisors (see below), whose sum is σ = 1667304. Its totient is φ = 1075200.

The previous prime is 1366693. The next prime is 1366709. The reversal of 1366705 is 5076631.

It can be written as a sum of positive squares in 4 ways, for example, as 39601 + 1327104 = 199^2 + 1152^2 .

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

It is not a de Polignac number, because 1366705 - 2⁷ = 1366577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1366709) 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, 1936 + ... + 2545.

It is an arithmetic number, because the mean of its divisors is an integer number (208413).

2^1366705 is an apocalyptic number.

It is an amenable number.

1366705 is a deficient number, since it is larger than the sum of its proper divisors (300599).

1366705 is an equidigital number, since it uses as much as digits as its factorization.

1366705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4547.

The product of its (nonzero) digits is 3780, while the sum is 28.

The square root of 1366705 is about 1169.0615894811. The cubic root of 1366705 is about 110.9749422647.

The spelling of 1366705 in words is "one million, three hundred sixty-six thousand, seven hundred five".