1386005 has 8 divisors (see below), whose sum is σ = 1704024. Its totient is φ = 1081600.

The previous prime is 1385987. The next prime is 1386013. The reversal of 1386005 is 5006831.

1386005 is nontrivially palindromic in base 4.

It can be written as a sum of positive squares in 4 ways, for example, as 54289 + 1331716 = 233^2 + 1154^2 .

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

It is not a de Polignac number, because 1386005 - 2⁸ = 1385749 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3176 + ... + 3585.

It is an arithmetic number, because the mean of its divisors is an integer number (213003).

2^1386005 is an apocalyptic number.

It is an amenable number.

1386005 is a deficient number, since it is larger than the sum of its proper divisors (318019).

1386005 is an equidigital number, since it uses as much as digits as its factorization.

1386005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6807.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 1386005 is about 1177.2871357490. The cubic root of 1386005 is about 111.4948820269.

The spelling of 1386005 in words is "one million, three hundred eighty-six thousand, five".