1105542421 has 2 divisors, whose sum is σ = 1105542422. Its totient is φ = 1105542420.

The previous prime is 1105542397. The next prime is 1105542439. The reversal of 1105542421 is 1242455011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 716900625 + 388641796 = 26775^2 + 19714^2 .

It is a cyclic number.

It is not a de Polignac number, because 1105542421 - 2⁷ = 1105542293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1105542481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 552771210 + 552771211.

It is an arithmetic number, because the mean of its divisors is an integer number (552771211).

Almost surely, 2^1105542421 is an apocalyptic number.

It is an amenable number.

1105542421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1105542421 is an equidigital number, since it uses as much as digits as its factorization.

1105542421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 1105542421 is about 33249.6980587794. The cubic root of 1105542421 is about 1034.0109483955.

Adding to 1105542421 its reverse (1242455011), we get a palindrome (2347997432).

The spelling of 1105542421 in words is "one billion, one hundred five million, five hundred forty-two thousand, four hundred twenty-one".