1311103 has 2 divisors, whose sum is σ = 1311104. Its totient is φ = 1311102.

The previous prime is 1311097. The next prime is 1311109. The reversal of 1311103 is 3011131.

It is a balanced prime because it is at equal distance from previous prime (1311097) and next prime (1311109).

It is an emirp because it is prime and its reverse (3011131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1311103 - 2⁹ = 1310591 is a prime.

It is a zygodrome in base 4.

It is a self number, because there is not a number n which added to its sum of digits gives 1311103.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1311109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655551 + 655552.

It is an arithmetic number, because the mean of its divisors is an integer number (655552).

2^1311103 is an apocalyptic number.

1311103 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311103 is an equidigital number, since it uses as much as digits as its factorization.

1311103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9, while the sum is 10.

The square root of 1311103 is about 1145.0340606288. The cubic root of 1311103 is about 109.4491190672.

Adding to 1311103 its reverse (3011131), we get a palindrome (4322234).

The spelling of 1311103 in words is "one million, three hundred eleven thousand, one hundred three".