1105814021 has 4 divisors (see below), whose sum is σ = 1190876652. Its totient is φ = 1020751392.

The previous prime is 1105813991. The next prime is 1105814081. The reversal of 1105814021 is 1204185011.

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 242923396 + 862890625 = 15586^2 + 29375^2 .

It is a cyclic number.

It is not a de Polignac number, because 1105814021 - 2¹⁸ = 1105551877 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 (1105814081) 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, 42531296 + ... + 42531321.

It is an arithmetic number, because the mean of its divisors is an integer number (297719163).

Almost surely, 2^1105814021 is an apocalyptic number.

It is an amenable number.

1105814021 is a deficient number, since it is larger than the sum of its proper divisors (85062631).

1105814021 is an equidigital number, since it uses as much as digits as its factorization.

1105814021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85062630.

The product of its (nonzero) digits is 320, while the sum is 23.

The square root of 1105814021 is about 33253.7820555798. The cubic root of 1105814021 is about 1034.0956170533.

Adding to 1105814021 its reverse (1204185011), we get a palindrome (2309999032).

The spelling of 1105814021 in words is "one billion, one hundred five million, eight hundred fourteen thousand, twenty-one".