421811712 has 200 divisors, whose sum is σ = 1439843856. Its totient is φ = 120434688.

The previous prime is 421811707. The next prime is 421811737. The reversal of 421811712 is 217118124.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nude number because it is divisible by every one of its digits and also a Zuckerman number because it is divisible by the product of its digits.

It is a nialpdrome in base 12.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 289578 + ... + 291030.

Almost surely, 2^421811712 is an apocalyptic number.

421811712 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421811712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (719921928).

421811712 is an abundant number, since it is smaller than the sum of its proper divisors (1018032144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

421811712 is an equidigital number, since it uses as much as digits as its factorization.

421811712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1490 (or 1465 counting only the distinct ones).

The product of its digits is 896, while the sum is 27.

The square root of 421811712 is about 20538.0552146497. The cubic root of 421811712 is about 749.9624941244.

Adding to 421811712 its reverse (217118124), we get a palindrome (638929836).

The spelling of 421811712 in words is "four hundred twenty-one million, eight hundred eleven thousand, seven hundred twelve".