1123551243 has 20 divisors (see below), whose sum is σ = 1684398408. Its totient is φ = 746353440.

The previous prime is 1123551241. The next prime is 1123551251. The reversal of 1123551243 is 3421553211.

1123551243 is a `hidden beast` number, since 112 + 35 + 512 + 4 + 3 = 666.

It is not a de Polignac number, because 1123551243 - 2¹ = 1123551241 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1123551241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1921 + ... + 47442.

Almost surely, 2^1123551243 is an apocalyptic number.

1123551243 is a deficient number, since it is larger than the sum of its proper divisors (560847165).

1123551243 is an equidigital number, since it uses as much as digits as its factorization.

1123551243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49656 (or 49647 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 1123551243 is about 33519.4159107822. The cubic root of 1123551243 is about 1039.5952699674.

The spelling of 1123551243 in words is "one billion, one hundred twenty-three million, five hundred fifty-one thousand, two hundred forty-three".