420505443 has 12 divisors (see below), whose sum is σ = 609941280. Its totient is φ = 279162576.

The previous prime is 420505429. The next prime is 420505447. The reversal of 420505443 is 344505024.

It is not a de Polignac number, because 420505443 - 2¹⁰ = 420504419 is a prime.

It is not an unprimeable number, because it can be changed into a prime (420505447) 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 in 11 ways as a sum of consecutive naturals, for example, 95596 + ... + 99897.

It is an arithmetic number, because the mean of its divisors is an integer number (50828440).

Almost surely, 2^420505443 is an apocalyptic number.

420505443 is a deficient number, since it is larger than the sum of its proper divisors (189435837).

420505443 is a wasteful number, since it uses less digits than its factorization.

420505443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195738 (or 195735 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 27.

The square root of 420505443 is about 20506.2293706083. The cubic root of 420505443 is about 749.1875308430.

The spelling of 420505443 in words is "four hundred twenty million, five hundred five thousand, four hundred forty-three".