421687016 has 16 divisors (see below), whose sum is σ = 790995300. Its totient is φ = 210754944.

The previous prime is 421686997. The next prime is 421687127. The reversal of 421687016 is 610786124.

It can be written as a sum of positive squares in 2 ways, for example, as 421480900 + 206116 = 20530^2 + 454^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11990 + ... + 31418.

Almost surely, 2^421687016 is an apocalyptic number.

It is an amenable number.

421687016 is a deficient number, since it is larger than the sum of its proper divisors (369308284).

421687016 is a wasteful number, since it uses less digits than its factorization.

421687016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22148 (or 22144 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 421687016 is about 20535.0192597913. The cubic root of 421687016 is about 749.8885855240. Note that the first 3 decimals are identical.

The spelling of 421687016 in words is "four hundred twenty-one million, six hundred eighty-seven thousand, sixteen".