421216985 has 48 divisors (see below), whose sum is σ = 634314240. Its totient is φ = 266837760.

The previous prime is 421216951. The next prime is 421216987. The reversal of 421216985 is 589612124.

It is not a de Polignac number, because 421216985 - 2⁸ = 421216729 is a prime.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421216987) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 189752 + ... + 191958.

It is an arithmetic number, because the mean of its divisors is an integer number (13214880).

Almost surely, 2^421216985 is an apocalyptic number.

It is an amenable number.

421216985 is a deficient number, since it is larger than the sum of its proper divisors (213097255).

421216985 is a wasteful number, since it uses less digits than its factorization.

421216985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2286 (or 2279 counting only the distinct ones).

The product of its digits is 34560, while the sum is 38.

The square root of 421216985 is about 20523.5714484590. The cubic root of 421216985 is about 749.6098622771.

The spelling of 421216985 in words is "four hundred twenty-one million, two hundred sixteen thousand, nine hundred eighty-five".