1109243 has 2 divisors, whose sum is σ = 1109244. Its totient is φ = 1109242.

The previous prime is 1109231. The next prime is 1109249. The reversal of 1109243 is 3429011.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1109243 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1109249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 554621 + 554622.

It is an arithmetic number, because the mean of its divisors is an integer number (554622).

2^1109243 is an apocalyptic number.

1109243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1109243 is an equidigital number, since it uses as much as digits as its factorization.

1109243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 1109243 is about 1053.2060577114. The cubic root of 1109243 is about 103.5163377478.

The spelling of 1109243 in words is "one million, one hundred nine thousand, two hundred forty-three".