1105432421 has 4 divisors (see below), whose sum is σ = 1117853100. Its totient is φ = 1093011744.

The previous prime is 1105432351. The next prime is 1105432439. The reversal of 1105432421 is 1242345011.

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

It can be written as a sum of positive squares in 2 ways, for example, as 701985025 + 403447396 = 26495^2 + 20086^2 .

It is a cyclic number.

It is not a de Polignac number, because 1105432421 - 2¹⁸ = 1105170277 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 (1105432481) 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, 6210206 + ... + 6210383.

It is an arithmetic number, because the mean of its divisors is an integer number (279463275).

Almost surely, 2^1105432421 is an apocalyptic number.

It is an amenable number.

1105432421 is a deficient number, since it is larger than the sum of its proper divisors (12420679).

1105432421 is an equidigital number, since it uses as much as digits as its factorization.

1105432421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12420678.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 1105432421 is about 33248.0438672713. The cubic root of 1105432421 is about 1033.9766530201.

Adding to 1105432421 its reverse (1242345011), we get a palindrome (2347777432).

The spelling of 1105432421 in words is "one billion, one hundred five million, four hundred thirty-two thousand, four hundred twenty-one".