421421814 has 48 divisors (see below), whose sum is σ = 1003991040. Its totient is φ = 126690480.

The previous prime is 421421813. The next prime is 421421831. The reversal of 421421814 is 418124124.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421421813) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16767 + ... + 33525.

It is an arithmetic number, because the mean of its divisors is an integer number (20916480).

Almost surely, 2^421421814 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421421814, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (501995520).

421421814 is an abundant number, since it is smaller than the sum of its proper divisors (582569226).

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

421421814 is a wasteful number, since it uses less digits than its factorization.

421421814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16905 (or 16902 counting only the distinct ones).

The product of its digits is 2048, while the sum is 27.

The square root of 421421814 is about 20528.5609334897. The cubic root of 421421814 is about 749.7313491138.

Adding to 421421814 its reverse (418124124), we get a palindrome (839545938).

It can be divided in two parts, 42142 and 1814, that added together give a triangular number (43956 = T₂₉₆).

The spelling of 421421814 in words is "four hundred twenty-one million, four hundred twenty-one thousand, eight hundred fourteen".