1109729 has 4 divisors (see below), whose sum is σ = 1120020. Its totient is φ = 1099440.

The previous prime is 1109723. The next prime is 1109737. The reversal of 1109729 is 9279011.

1109729 is nontrivially palindromic in base 2.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 719104 + 390625 = 848^2 + 625^2 .

It is a cyclic number.

It is not a de Polignac number, because 1109729 - 2⁸ = 1109473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1109723) 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 in 3 ways as a sum of consecutive naturals, for example, 4982 + ... + 5199.

It is an arithmetic number, because the mean of its divisors is an integer number (280005).

2^1109729 is an apocalyptic number.

It is an amenable number.

1109729 is a deficient number, since it is larger than the sum of its proper divisors (10291).

1109729 is a wasteful number, since it uses less digits than its factorization.

1109729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10290.

The product of its (nonzero) digits is 1134, while the sum is 29.

The square root of 1109729 is about 1053.4367565260. The cubic root of 1109729 is about 103.5314536405.

The spelling of 1109729 in words is "one million, one hundred nine thousand, seven hundred twenty-nine".