1121543533 has 32 divisors (see below), whose sum is σ = 1368576000. Its totient is φ = 905829120.

The previous prime is 1121543497. The next prime is 1121543537. The reversal of 1121543533 is 3353451211.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1121543533 - 2⁹ = 1121543021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121543537) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1701558 + ... + 1702216.

It is an arithmetic number, because the mean of its divisors is an integer number (42768000).

Almost surely, 2^1121543533 is an apocalyptic number.

It is an amenable number.

1121543533 is a deficient number, since it is larger than the sum of its proper divisors (247032467).

1121543533 is a wasteful number, since it uses less digits than its factorization.

1121543533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1185.

The product of its digits is 5400, while the sum is 28.

The square root of 1121543533 is about 33489.4540564638. The cubic root of 1121543533 is about 1038.9756719740.

Adding to 1121543533 its reverse (3353451211), we get a palindrome (4474994744).

The spelling of 1121543533 in words is "one billion, one hundred twenty-one million, five hundred forty-three thousand, five hundred thirty-three".