1115789 has 2 divisors, whose sum is σ = 1115790. Its totient is φ = 1115788.

The previous prime is 1115773. The next prime is 1115831. The reversal of 1115789 is 9875111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 917764 + 198025 = 958^2 + 445^2 .

It is a cyclic number.

It is not a de Polignac number, because 1115789 - 2⁴ = 1115773 is a prime.

It is a Chen prime.

It is a plaindrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1115759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 557894 + 557895.

It is an arithmetic number, because the mean of its divisors is an integer number (557895).

2^1115789 is an apocalyptic number.

It is an amenable number.

1115789 is a deficient number, since it is larger than the sum of its proper divisors (1).

1115789 is an equidigital number, since it uses as much as digits as its factorization.

1115789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2520, while the sum is 32.

The square root of 1115789 is about 1056.3091403562. The cubic root of 1115789 is about 103.7195662417.

The spelling of 1115789 in words is "one million, one hundred fifteen thousand, seven hundred eighty-nine".