1312743 has 16 divisors (see below), whose sum is σ = 1843200. Its totient is φ = 829920.

The previous prime is 1312739. The next prime is 1312769. The reversal of 1312743 is 3472131.

It is not a de Polignac number, because 1312743 - 2² = 1312739 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312733) 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 15 ways as a sum of consecutive naturals, for example, 6778 + ... + 6968.

It is an arithmetic number, because the mean of its divisors is an integer number (115200).

2^1312743 is an apocalyptic number.

1312743 is a deficient number, since it is larger than the sum of its proper divisors (530457).

1312743 is a wasteful number, since it uses less digits than its factorization.

1312743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302.

The product of its digits is 504, while the sum is 21.

The square root of 1312743 is about 1145.7499727253. The cubic root of 1312743 is about 109.4947350526.

Adding to 1312743 its reverse (3472131), we get a palindrome (4784874).

The spelling of 1312743 in words is "one million, three hundred twelve thousand, seven hundred forty-three".