420455043 has 20 divisors (see below), whose sum is σ = 628730520. Its totient is φ = 280016352.

The previous prime is 420455039. The next prime is 420455059. The reversal of 420455043 is 340554024.

It is not a de Polignac number, because 420455043 - 2² = 420455039 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 420454998 and 420455016.

It is not an unprimeable number, because it can be changed into a prime (420455003) 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 19 ways as a sum of consecutive naturals, for example, 102396 + ... + 106422.

It is an arithmetic number, because the mean of its divisors is an integer number (31436526).

Almost surely, 2^420455043 is an apocalyptic number.

420455043 is a deficient number, since it is larger than the sum of its proper divisors (208275477).

420455043 is a wasteful number, since it uses less digits than its factorization.

420455043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5328 (or 5319 counting only the distinct ones).

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

The square root of 420455043 is about 20505.0004389173. Note that the first 3 decimals coincide. The cubic root of 420455043 is about 749.1575981665.

The spelling of 420455043 in words is "four hundred twenty million, four hundred fifty-five thousand, forty-three".