1386566 has 4 divisors (see below), whose sum is σ = 2079852. Its totient is φ = 693282.

The previous prime is 1386557. The next prime is 1386569. The reversal of 1386566 is 6656831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6656831 = 179 ⋅37189.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1386569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 346640 + ... + 346643.

It is an arithmetic number, because the mean of its divisors is an integer number (519963).

2^1386566 is an apocalyptic number.

1386566 is a deficient number, since it is larger than the sum of its proper divisors (693286).

1386566 is an equidigital number, since it uses as much as digits as its factorization.

1386566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693285.

The product of its digits is 25920, while the sum is 35.

The square root of 1386566 is about 1177.5253712766. The cubic root of 1386566 is about 111.5099229038.

It can be divided in two parts, 13865 and 66, that added together give a palindrome (13931).

The spelling of 1386566 in words is "one million, three hundred eighty-six thousand, five hundred sixty-six".