1123512745 has 16 divisors (see below), whose sum is σ = 1428451200. Its totient is φ = 845388544.

The previous prime is 1123512737. The next prime is 1123512787. The reversal of 1123512745 is 5472153211.

It is a cyclic number.

It is not a de Polignac number, because 1123512745 - 2³ = 1123512737 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 166956 + ... + 173554.

It is an arithmetic number, because the mean of its divisors is an integer number (89278200).

Almost surely, 2^1123512745 is an apocalyptic number.

It is an amenable number.

1123512745 is a deficient number, since it is larger than the sum of its proper divisors (304938455).

1123512745 is a wasteful number, since it uses less digits than its factorization.

1123512745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8624.

The product of its digits is 8400, while the sum is 31.

The square root of 1123512745 is about 33518.8416416797. The cubic root of 1123512745 is about 1039.5833960702.

Adding to 1123512745 its reverse (5472153211), we get a palindrome (6595665956).

The spelling of 1123512745 in words is "one billion, one hundred twenty-three million, five hundred twelve thousand, seven hundred forty-five".