1123407785 has 4 divisors (see below), whose sum is σ = 1348089348. Its totient is φ = 898726224.

The previous prime is 1123407773. The next prime is 1123407793. The reversal of 1123407785 is 5877043211.

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 408807961 + 714599824 = 20219^2 + 26732^2 .

It is a cyclic number.

It is not a de Polignac number, because 1123407785 - 2⁶ = 1123407721 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112340774 + ... + 112340783.

It is an arithmetic number, because the mean of its divisors is an integer number (337022337).

Almost surely, 2^1123407785 is an apocalyptic number.

It is an amenable number.

1123407785 is a deficient number, since it is larger than the sum of its proper divisors (224681563).

1123407785 is an equidigital number, since it uses as much as digits as its factorization.

1123407785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224681562.

The product of its (nonzero) digits is 47040, while the sum is 38.

The square root of 1123407785 is about 33517.2759185468. The cubic root of 1123407785 is about 1039.5510219912.

The spelling of 1123407785 in words is "one billion, one hundred twenty-three million, four hundred seven thousand, seven hundred eighty-five".