420064871 has 4 divisors (see below), whose sum is σ = 420124200. Its totient is φ = 420005544.

The previous prime is 420064867. The next prime is 420064889. The reversal of 420064871 is 178460024.

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 420064871 - 2² = 420064867 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420064861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17336 + ... + 33773.

It is an arithmetic number, because the mean of its divisors is an integer number (105031050).

Almost surely, 2^420064871 is an apocalyptic number.

420064871 is a deficient number, since it is larger than the sum of its proper divisors (59329).

420064871 is an equidigital number, since it uses as much as digits as its factorization.

420064871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59328.

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 420064871 is about 20495.4841611512. The cubic root of 420064871 is about 748.9257931370.

The spelling of 420064871 in words is "four hundred twenty million, sixty-four thousand, eight hundred seventy-one".