421105441 has 2 divisors, whose sum is σ = 421105442. Its totient is φ = 421105440.

The previous prime is 421105423. The next prime is 421105463. The reversal of 421105441 is 144501124.

It is an a-pointer prime, because the next prime (421105463) can be obtained adding 421105441 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 336539025 + 84566416 = 18345^2 + 9196^2 .

It is a cyclic number.

It is not a de Polignac number, because 421105441 - 2⁵ = 421105409 is a prime.

It is not a weakly prime, because it can be changed into another prime (421105541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210552720 + 210552721.

It is an arithmetic number, because the mean of its divisors is an integer number (210552721).

Almost surely, 2^421105441 is an apocalyptic number.

It is an amenable number.

421105441 is a deficient number, since it is larger than the sum of its proper divisors (1).

421105441 is an equidigital number, since it uses as much as digits as its factorization.

421105441 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 421105441 is about 20520.8538077732. The cubic root of 421105441 is about 749.5436874652.

Adding to 421105441 its reverse (144501124), we get a palindrome (565606565).

The spelling of 421105441 in words is "four hundred twenty-one million, one hundred five thousand, four hundred forty-one".