1356841 has 4 divisors (see below), whose sum is σ = 1359184. Its totient is φ = 1354500.

The previous prime is 1356829. The next prime is 1356857. The reversal of 1356841 is 1486531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1486531 = 17 ⋅87443.

It is a cyclic number.

It is not a de Polignac number, because 1356841 - 2⁷ = 1356713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1356811) 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, 406 + ... + 1696.

It is an arithmetic number, because the mean of its divisors is an integer number (339796).

2^1356841 is an apocalyptic number.

It is an amenable number.

1356841 is a deficient number, since it is larger than the sum of its proper divisors (2343).

1356841 is a wasteful number, since it uses less digits than its factorization.

1356841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2342.

The product of its digits is 2880, while the sum is 28.

The square root of 1356841 is about 1164.8351814742. The cubic root of 1356841 is about 110.7073153929.

It can be divided in two parts, 1356 and 841, that added together give a cube (2197 = 13³).

The spelling of 1356841 in words is "one million, three hundred fifty-six thousand, eight hundred forty-one".