1117729 has 2 divisors, whose sum is σ = 1117730. Its totient is φ = 1117728.

The previous prime is 1117709. The next prime is 1117741. The reversal of 1117729 is 9277111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1106704 + 11025 = 1052^2 + 105^2 .

It is a cyclic number.

It is not a de Polignac number, because 1117729 - 2⁷ = 1117601 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1117697 and 1117706.

It is not a weakly prime, because it can be changed into another prime (1117709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 558864 + 558865.

It is an arithmetic number, because the mean of its divisors is an integer number (558865).

2^1117729 is an apocalyptic number.

It is an amenable number.

1117729 is a deficient number, since it is larger than the sum of its proper divisors (1).

1117729 is an equidigital number, since it uses as much as digits as its factorization.

1117729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 882, while the sum is 28.

The square root of 1117729 is about 1057.2270333282. The cubic root of 1117729 is about 103.7796431482.

The spelling of 1117729 in words is "one million, one hundred seventeen thousand, seven hundred twenty-nine".