1111543 has 2 divisors, whose sum is σ = 1111544. Its totient is φ = 1111542.

The previous prime is 1111531. The next prime is 1111547. The reversal of 1111543 is 3451111.

It is a strong prime.

It is an emirp because it is prime and its reverse (3451111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1111543 - 2⁹ = 1111031 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1111547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555771 + 555772.

It is an arithmetic number, because the mean of its divisors is an integer number (555772).

2^1111543 is an apocalyptic number.

1111543 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111543 is an equidigital number, since it uses as much as digits as its factorization.

1111543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60, while the sum is 16.

The square root of 1111543 is about 1054.2973963735. The cubic root of 1111543 is about 103.5878349187.

Adding to 1111543 its reverse (3451111), we get a palindrome (4562654).

The spelling of 1111543 in words is "one million, one hundred eleven thousand, five hundred forty-three".