421569916 has 6 divisors (see below), whose sum is σ = 737747360. Its totient is φ = 210784956.

The previous prime is 421569851. The next prime is 421569917. The reversal of 421569916 is 619965124.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421569917) 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 as a sum of consecutive naturals, namely, 52696236 + ... + 52696243.

Almost surely, 2^421569916 is an apocalyptic number.

It is an amenable number.

421569916 is a deficient number, since it is larger than the sum of its proper divisors (316177444).

421569916 is a wasteful number, since it uses less digits than its factorization.

421569916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105392483 (or 105392481 counting only the distinct ones).

The product of its digits is 116640, while the sum is 43.

The square root of 421569916 is about 20532.1678348878. The cubic root of 421569916 is about 749.8191658837.

The spelling of 421569916 in words is "four hundred twenty-one million, five hundred sixty-nine thousand, nine hundred sixteen".