1386605 has 16 divisors (see below), whose sum is σ = 1923264. Its totient is φ = 948480.

The previous prime is 1386587. The next prime is 1386607. The reversal of 1386605 is 5066831.

It is a de Polignac number, because none of the positive numbers 2^k-1386605 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1386607) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 194 + ... + 1676.

It is an arithmetic number, because the mean of its divisors is an integer number (120204).

2^1386605 is an apocalyptic number.

It is an amenable number.

1386605 is a deficient number, since it is larger than the sum of its proper divisors (536659).

1386605 is a wasteful number, since it uses less digits than its factorization.

1386605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1516.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 1386605 is about 1177.5419313129. The cubic root of 1386605 is about 111.5109683754.

It can be divided in two parts, 1386 and 605, that added together give a palindrome (1991).

The spelling of 1386605 in words is "one million, three hundred eighty-six thousand, six hundred five".