1123105545 has 24 divisors (see below), whose sum is σ = 1948746696. Its totient is φ = 598364928.

The previous prime is 1123105513. The next prime is 1123105547. The reversal of 1123105545 is 5455013211.

1123105545 is a `hidden beast` number, since 1 + 12 + 3 + 105 + 545 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 90383049 + 1032722496 = 9507^2 + 32136^2 .

It is not a de Polignac number, because 1123105545 - 2⁵ = 1123105513 is a prime.

It is a super-2 number, since 2×1123105545² = 2522732130419494050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1123105547) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32349 + ... + 57381.

It is an arithmetic number, because the mean of its divisors is an integer number (81197779).

Almost surely, 2^1123105545 is an apocalyptic number.

1123105545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1123105545 is a deficient number, since it is larger than the sum of its proper divisors (825641151).

1123105545 is a wasteful number, since it uses less digits than its factorization.

1123105545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26041 (or 26038 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The square root of 1123105545 is about 33512.7668956176. The cubic root of 1123105545 is about 1039.4577871967.

Adding to 1123105545 its reverse (5455013211), we get a palindrome (6578118756).

It can be divided in two parts, 112310 and 5545, that added together give a triangular number (117855 = T₄₈₅).

The spelling of 1123105545 in words is "one billion, one hundred twenty-three million, one hundred five thousand, five hundred forty-five".