1123445205 has 48 divisors (see below), whose sum is σ = 2069857920. Its totient is φ = 562080384.

The previous prime is 1123445117. The next prime is 1123445231. The reversal of 1123445205 is 5025443211.

1123445205 is a `hidden beast` number, since 1 + 12 + 3 + 445 + 205 = 666.

It is not a de Polignac number, because 1123445205 - 2⁷ = 1123445077 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 81687 + ... + 94443.

It is an arithmetic number, because the mean of its divisors is an integer number (43122040).

Almost surely, 2^1123445205 is an apocalyptic number.

1123445205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1123445205 is a deficient number, since it is larger than the sum of its proper divisors (946412715).

1123445205 is a wasteful number, since it uses less digits than its factorization.

1123445205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12890 (or 12887 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 1123445205 is about 33517.8341334878. The cubic root of 1123445205 is about 1039.5625641245.

Adding to 1123445205 its reverse (5025443211), we get a palindrome (6148888416).

The spelling of 1123445205 in words is "one billion, one hundred twenty-three million, four hundred forty-five thousand, two hundred five".