1311543 has 12 divisors (see below), whose sum is σ = 1939080. Its totient is φ = 853776.

The previous prime is 1311523. The next prime is 1311547. The reversal of 1311543 is 3451131.

It is not a de Polignac number, because 1311543 - 2⁸ = 1311287 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311547) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1308 + ... + 2081.

It is an arithmetic number, because the mean of its divisors is an integer number (161590).

2^1311543 is an apocalyptic number.

1311543 is a deficient number, since it is larger than the sum of its proper divisors (627537).

1311543 is a wasteful number, since it uses less digits than its factorization.

1311543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3438 (or 3435 counting only the distinct ones).

The product of its digits is 180, while the sum is 18.

The square root of 1311543 is about 1145.2261785342. The cubic root of 1311543 is about 109.4613612344.

Adding to 1311543 its reverse (3451131), we get a palindrome (4762674).

The spelling of 1311543 in words is "one million, three hundred eleven thousand, five hundred forty-three".