1311843 has 8 divisors (see below), whose sum is σ = 1883728. Its totient is φ = 807264.

The previous prime is 1311829. The next prime is 1311847. The reversal of 1311843 is 3481131.

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

It is not a de Polignac number, because 1311843 - 2¹⁶ = 1246307 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 (1311847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16780 + ... + 16857.

It is an arithmetic number, because the mean of its divisors is an integer number (235466).

2^1311843 is an apocalyptic number.

1311843 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1311843 is a deficient number, since it is larger than the sum of its proper divisors (571885).

1311843 is a wasteful number, since it uses less digits than its factorization.

1311843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33653.

The product of its digits is 288, while the sum is 21.

The square root of 1311843 is about 1145.3571495390. The cubic root of 1311843 is about 109.4697065968.

Adding to 1311843 its product of digits (288), we get a palindrome (1312131).

Adding to 1311843 its reverse (3481131), we get a palindrome (4792974).

The spelling of 1311843 in words is "one million, three hundred eleven thousand, eight hundred forty-three".