1121445609 has 8 divisors (see below), whose sum is σ = 1496833632. Its totient is φ = 746844000.

The previous prime is 1121445601. The next prime is 1121445623. The reversal of 1121445609 is 9065441211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1121445609 - 2³ = 1121445601 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1121445609.

It is not an unprimeable number, because it can be changed into a prime (1121445601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 193267 + ... + 198984.

It is an arithmetic number, because the mean of its divisors is an integer number (187104204).

Almost surely, 2^1121445609 is an apocalyptic number.

It is an amenable number.

1121445609 is a deficient number, since it is larger than the sum of its proper divisors (375388023).

1121445609 is an equidigital number, since it uses as much as digits as its factorization.

1121445609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393207.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 1121445609 is about 33487.9920120631. The cubic root of 1121445609 is about 1038.9454328105.

The spelling of 1121445609 in words is "one billion, one hundred twenty-one million, four hundred forty-five thousand, six hundred nine".