1105442621 has 2 divisors, whose sum is σ = 1105442622. Its totient is φ = 1105442620.

The previous prime is 1105442617. The next prime is 1105442623. The reversal of 1105442621 is 1262445011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 837465721 + 267976900 = 28939^2 + 16370^2 .

It is an emirp because it is prime and its reverse (1262445011) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1105442621 - 2² = 1105442617 is a prime.

Together with 1105442623, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1105442623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 552721310 + 552721311.

It is an arithmetic number, because the mean of its divisors is an integer number (552721311).

Almost surely, 2^1105442621 is an apocalyptic number.

It is an amenable number.

1105442621 is a deficient number, since it is larger than the sum of its proper divisors (1).

1105442621 is an equidigital number, since it uses as much as digits as its factorization.

1105442621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 1105442621 is about 33248.1972594004. The cubic root of 1105442621 is about 1033.9798332325.

Adding to 1105442621 its reverse (1262445011), we get a palindrome (2367887632).

The spelling of 1105442621 in words is "one billion, one hundred five million, four hundred forty-two thousand, six hundred twenty-one".