1105543421 has 4 divisors (see below), whose sum is σ = 1141206144. Its totient is φ = 1069880700.

The previous prime is 1105543409. The next prime is 1105543427. The reversal of 1105543421 is 1243455011.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1105543421 - 2¹⁰ = 1105542397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1105543427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17831315 + ... + 17831376.

It is an arithmetic number, because the mean of its divisors is an integer number (285301536).

Almost surely, 2^1105543421 is an apocalyptic number.

It is an amenable number.

1105543421 is a deficient number, since it is larger than the sum of its proper divisors (35662723).

1105543421 is an equidigital number, since it uses as much as digits as its factorization.

1105543421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35662722.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 1105543421 is about 33249.7130965066. The cubic root of 1105543421 is about 1034.0112601612.

Adding to 1105543421 its reverse (1243455011), we get a palindrome (2348998432).

The spelling of 1105543421 in words is "one billion, one hundred five million, five hundred forty-three thousand, four hundred twenty-one".