1123454345 has 32 divisors (see below), whose sum is σ = 1512241920. Its totient is φ = 795513600.

The previous prime is 1123454327. The next prime is 1123454369. The reversal of 1123454345 is 5434543211.

It is not a de Polignac number, because 1123454345 - 2⁶ = 1123454281 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 282662 + ... + 286608.

It is an arithmetic number, because the mean of its divisors is an integer number (47257560).

Almost surely, 2^1123454345 is an apocalyptic number.

It is an amenable number.

1123454345 is a deficient number, since it is larger than the sum of its proper divisors (388787575).

1123454345 is a wasteful number, since it uses less digits than its factorization.

1123454345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4145.

The product of its digits is 28800, while the sum is 32.

The square root of 1123454345 is about 33517.9704785358. The cubic root of 1123454345 is about 1039.5653833025.

Adding to 1123454345 its reverse (5434543211), we get a palindrome (6557997556).

The spelling of 1123454345 in words is "one billion, one hundred twenty-three million, four hundred fifty-four thousand, three hundred forty-five".