1123505747 has 24 divisors (see below), whose sum is σ = 1413257760. Its totient is φ = 874298880.

The previous prime is 1123505737. The next prime is 1123505753. The reversal of 1123505747 is 7475053211.

It is not a de Polignac number, because 1123505747 - 2⁴ = 1123505731 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1123505717) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 64379 + ... + 79947.

It is an arithmetic number, because the mean of its divisors is an integer number (58885740).

Almost surely, 2^1123505747 is an apocalyptic number.

1123505747 is a deficient number, since it is larger than the sum of its proper divisors (289752013).

1123505747 is a wasteful number, since it uses less digits than its factorization.

1123505747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15663 (or 15650 counting only the distinct ones).

The product of its (nonzero) digits is 29400, while the sum is 35.

The square root of 1123505747 is about 33518.7372524682. The cubic root of 1123505747 is about 1039.5812376554.

Adding to 1123505747 its reverse (7475053211), we get a palindrome (8598558958).

The spelling of 1123505747 in words is "one billion, one hundred twenty-three million, five hundred five thousand, seven hundred forty-seven".