1123544005 has 16 divisors (see below), whose sum is σ = 1464998400. Its totient is φ = 824057280.

The previous prime is 1123544003. The next prime is 1123544011. The reversal of 1123544005 is 5004453211.

It is a happy number.

It is not a de Polignac number, because 1123544005 - 2¹ = 1123544003 is a prime.

It is a super-2 number, since 2×1123544005² = 2524702262342880050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123544003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 187810 + ... + 193699.

It is an arithmetic number, because the mean of its divisors is an integer number (91562400).

Almost surely, 2^1123544005 is an apocalyptic number.

It is an amenable number.

1123544005 is a deficient number, since it is larger than the sum of its proper divisors (341454395).

1123544005 is a wasteful number, since it uses less digits than its factorization.

1123544005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381564.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 1123544005 is about 33519.3079433332. The cubic root of 1123544005 is about 1039.5930375795.

Adding to 1123544005 its reverse (5004453211), we get a palindrome (6127997216).

The spelling of 1123544005 in words is "one billion, one hundred twenty-three million, five hundred forty-four thousand, five".