1312543 has 2 divisors, whose sum is σ = 1312544. Its totient is φ = 1312542.

The previous prime is 1312523. The next prime is 1312547. The reversal of 1312543 is 3452131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1312543 - 2¹⁷ = 1181471 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1312543.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1312547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656271 + 656272.

It is an arithmetic number, because the mean of its divisors is an integer number (656272).

2^1312543 is an apocalyptic number.

1312543 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312543 is an equidigital number, since it uses as much as digits as its factorization.

1312543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 360, while the sum is 19.

The square root of 1312543 is about 1145.6626903238. The cubic root of 1312543 is about 109.4891741624.

Adding to 1312543 its reverse (3452131), we get a palindrome (4764674).

The spelling of 1312543 in words is "one million, three hundred twelve thousand, five hundred forty-three".