1311043 has 2 divisors, whose sum is σ = 1311044. Its totient is φ = 1311042.

The previous prime is 1311031. The next prime is 1311047. The reversal of 1311043 is 3401131.

It is a strong prime.

It is an emirp because it is prime and its reverse (3401131) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1311043 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (1311047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655521 + 655522.

It is an arithmetic number, because the mean of its divisors is an integer number (655522).

2^1311043 is an apocalyptic number.

1311043 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311043 is an equidigital number, since it uses as much as digits as its factorization.

1311043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 1311043 is about 1145.0078602350. The cubic root of 1311043 is about 109.4474494686.

Adding to 1311043 its reverse (3401131), we get a palindrome (4712174).

The spelling of 1311043 in words is "one million, three hundred eleven thousand, forty-three".