1121543542 has 8 divisors (see below), whose sum is σ = 1922646096. Its totient is φ = 480661512.

The previous prime is 1121543539. The next prime is 1121543597. The reversal of 1121543542 is 2453451211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1121543542.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40055113 + ... + 40055140.

It is an arithmetic number, because the mean of its divisors is an integer number (240330762).

Almost surely, 2^1121543542 is an apocalyptic number.

1121543542 is a deficient number, since it is larger than the sum of its proper divisors (801102554).

1121543542 is an equidigital number, since it uses as much as digits as its factorization.

1121543542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80110262.

The product of its digits is 4800, while the sum is 28.

The square root of 1121543542 is about 33489.4541908345. The cubic root of 1121543542 is about 1038.9756747532.

Adding to 1121543542 its reverse (2453451211), we get a palindrome (3574994753).

The spelling of 1121543542 in words is "one billion, one hundred twenty-one million, five hundred forty-three thousand, five hundred forty-two".