1356863 has 4 divisors (see below), whose sum is σ = 1359408. Its totient is φ = 1354320.

The previous prime is 1356857. The next prime is 1356869. The reversal of 1356863 is 3686531.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1356857) and next prime (1356869).

It is a cyclic number.

It is not a de Polignac number, because 1356863 - 2¹⁶ = 1291327 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 (1356869) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131 + ... + 1652.

It is an arithmetic number, because the mean of its divisors is an integer number (339852).

2^1356863 is an apocalyptic number.

1356863 is a deficient number, since it is larger than the sum of its proper divisors (2545).

1356863 is an equidigital number, since it uses as much as digits as its factorization.

1356863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2544.

The product of its digits is 12960, while the sum is 32.

The square root of 1356863 is about 1164.8446248320. The cubic root of 1356863 is about 110.7079137307.

It can be divided in two parts, 13568 and 63, that added together give a palindrome (13631).

The spelling of 1356863 in words is "one million, three hundred fifty-six thousand, eight hundred sixty-three".