1115839 has 2 divisors, whose sum is σ = 1115840. Its totient is φ = 1115838.

The previous prime is 1115831. The next prime is 1115843. The reversal of 1115839 is 9385111.

It is a strong prime.

It is an emirp because it is prime and its reverse (9385111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1115839 - 2³ = 1115831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1115831) 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 as a sum of consecutive naturals, namely, 557919 + 557920.

It is an arithmetic number, because the mean of its divisors is an integer number (557920).

2^1115839 is an apocalyptic number.

1115839 is a deficient number, since it is larger than the sum of its proper divisors (1).

1115839 is an equidigital number, since it uses as much as digits as its factorization.

1115839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1080, while the sum is 28.

The square root of 1115839 is about 1056.3328074049. The cubic root of 1115839 is about 103.7211154894.

The spelling of 1115839 in words is "one million, one hundred fifteen thousand, eight hundred thirty-nine".