1133521243 has 4 divisors (see below), whose sum is σ = 1133941768. Its totient is φ = 1133100720.

The previous prime is 1133521241. The next prime is 1133521253. The reversal of 1133521243 is 3421253311.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1133521243 - 2¹ = 1133521241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1133521241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 206193 + ... + 211618.

It is an arithmetic number, because the mean of its divisors is an integer number (283485442).

Almost surely, 2^1133521243 is an apocalyptic number.

1133521243 is a deficient number, since it is larger than the sum of its proper divisors (420525).

1133521243 is an equidigital number, since it uses as much as digits as its factorization.

1133521243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420524.

The product of its digits is 2160, while the sum is 25.

The square root of 1133521243 is about 33667.8072199542. The cubic root of 1133521243 is about 1042.6612204202.

Adding to 1133521243 its reverse (3421253311), we get a palindrome (4554774554).

The spelling of 1133521243 in words is "one billion, one hundred thirty-three million, five hundred twenty-one thousand, two hundred forty-three".