1366863 has 8 divisors (see below), whose sum is σ = 1827888. Its totient is φ = 908544.

The previous prime is 1366861. The next prime is 1366877. The reversal of 1366863 is 3686631.

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

It is not a de Polignac number, because 1366863 - 2¹ = 1366861 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1366861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1681 + ... + 2357.

It is an arithmetic number, because the mean of its divisors is an integer number (228486).

2^1366863 is an apocalyptic number.

1366863 is a deficient number, since it is larger than the sum of its proper divisors (461025).

1366863 is an equidigital number, since it uses as much as digits as its factorization.

1366863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1353.

The product of its digits is 15552, while the sum is 33.

The square root of 1366863 is about 1169.1291630953. The cubic root of 1366863 is about 110.9792185753.

It can be divided in two parts, 13668 and 63, that added together give a palindrome (13731).

The spelling of 1366863 in words is "one million, three hundred sixty-six thousand, eight hundred sixty-three".