1313743 has 4 divisors (see below), whose sum is σ = 1391040. Its totient is φ = 1236448.

The previous prime is 1313731. The next prime is 1313747. The reversal of 1313743 is 3473131.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1313743 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38623 + ... + 38656.

It is an arithmetic number, because the mean of its divisors is an integer number (347760).

2^1313743 is an apocalyptic number.

1313743 is a deficient number, since it is larger than the sum of its proper divisors (77297).

1313743 is an equidigital number, since it uses as much as digits as its factorization.

1313743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77296.

The product of its digits is 756, while the sum is 22.

The square root of 1313743 is about 1146.1862850340. The cubic root of 1313743 is about 109.5225310350.

Adding to 1313743 its reverse (3473131), we get a palindrome (4786874).

The spelling of 1313743 in words is "one million, three hundred thirteen thousand, seven hundred forty-three".