1386866 has 16 divisors (see below), whose sum is σ = 2296728. Its totient is φ = 624000.

The previous prime is 1386863. The next prime is 1386881. The reversal of 1386866 is 6686831.

It can be written as a sum of positive squares in 4 ways, for example, as 143641 + 1243225 = 379^2 + 1115^2 .

It is not an unprimeable number, because it can be changed into a prime (1386863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 416 + ... + 1716.

2^1386866 is an apocalyptic number.

1386866 is a deficient number, since it is larger than the sum of its proper divisors (909862).

1386866 is a wasteful number, since it uses less digits than its factorization.

1386866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1357.

The product of its digits is 41472, while the sum is 38.

The square root of 1386866 is about 1177.6527501772. The cubic root of 1386866 is about 111.5179644887.

The spelling of 1386866 in words is "one million, three hundred eighty-six thousand, eight hundred sixty-six".