420777171 has 12 divisors (see below), whose sum is σ = 608342280. Its totient is φ = 280262880.

The previous prime is 420777143. The next prime is 420777187. The reversal of 420777171 is 171777024.

It is not a de Polignac number, because 420777171 - 2⁹ = 420776659 is a prime.

It is not an unprimeable number, because it can be changed into a prime (420777101) 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, 10545 + ... + 30866.

It is an arithmetic number, because the mean of its divisors is an integer number (50695190).

Almost surely, 2^420777171 is an apocalyptic number.

420777171 is a deficient number, since it is larger than the sum of its proper divisors (187565109).

420777171 is a wasteful number, since it uses less digits than its factorization.

420777171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42546 (or 42543 counting only the distinct ones).

The product of its (nonzero) digits is 19208, while the sum is 36.

The square root of 420777171 is about 20512.8537995082. The cubic root of 420777171 is about 749.3488695357.

The spelling of 420777171 in words is "four hundred twenty million, seven hundred seventy-seven thousand, one hundred seventy-one".