420785443 has 4 divisors (see below), whose sum is σ = 453153568. Its totient is φ = 388417320.

The previous prime is 420785441. The next prime is 420785459. The reversal of 420785443 is 344587024.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 420785443 - 2¹ = 420785441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420785441) 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 3 ways as a sum of consecutive naturals, for example, 16184043 + ... + 16184068.

It is an arithmetic number, because the mean of its divisors is an integer number (113288392).

Almost surely, 2^420785443 is an apocalyptic number.

420785443 is a deficient number, since it is larger than the sum of its proper divisors (32368125).

420785443 is a wasteful number, since it uses less digits than its factorization.

420785443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32368124.

The product of its (nonzero) digits is 107520, while the sum is 37.

The square root of 420785443 is about 20513.0554281901. The cubic root of 420785443 is about 749.3537799520.

The spelling of 420785443 in words is "four hundred twenty million, seven hundred eighty-five thousand, four hundred forty-three".