420211647 has 12 divisors (see below), whose sum is σ = 607584744. Its totient is φ = 279858480.

The previous prime is 420211607. The next prime is 420211667. The reversal of 420211647 is 746112024.

420211647 is a `hidden beast` number, since 4 + 2 + 0 + 2 + 11 + 647 = 666.

It is not a de Polignac number, because 420211647 - 2¹² = 420207551 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 420211647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420211607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13929 + ... + 32162.

It is an arithmetic number, because the mean of its divisors is an integer number (50632062).

Almost surely, 2^420211647 is an apocalyptic number.

420211647 is a deficient number, since it is larger than the sum of its proper divisors (187373097).

420211647 is a wasteful number, since it uses less digits than its factorization.

420211647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47110 (or 47107 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 420211647 is about 20499.0645396320. The cubic root of 420211647 is about 749.0130110402.

The spelling of 420211647 in words is "four hundred twenty million, two hundred eleven thousand, six hundred forty-seven".