1123542321 has 8 divisors (see below), whose sum is σ = 1634243424. Its totient is φ = 680934720.

The previous prime is 1123542307. The next prime is 1123542323. The reversal of 1123542321 is 1232453211.

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

It is not a de Polignac number, because 1123542321 - 2¹⁵ = 1123509553 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1123542291 and 1123542300.

It is not an unprimeable number, because it can be changed into a prime (1123542323) 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 7 ways as a sum of consecutive naturals, for example, 17023336 + ... + 17023401.

It is an arithmetic number, because the mean of its divisors is an integer number (204280428).

Almost surely, 2^1123542321 is an apocalyptic number.

1123542321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1123542321 is a deficient number, since it is larger than the sum of its proper divisors (510701103).

1123542321 is a wasteful number, since it uses less digits than its factorization.

1123542321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34046751.

The product of its digits is 1440, while the sum is 24.

The square root of 1123542321 is about 33519.2828234734. The cubic root of 1123542321 is about 1039.5925181886.

Adding to 1123542321 its reverse (1232453211), we get a palindrome (2355995532).

The spelling of 1123542321 in words is "one billion, one hundred twenty-three million, five hundred forty-two thousand, three hundred twenty-one".