421003422 has 48 divisors (see below), whose sum is σ = 1051745760. Its totient is φ = 119218176.

The previous prime is 421003421. The next prime is 421003423. The reversal of 421003422 is 224300124.

It is an interprime number because it is at equal distance from previous prime (421003421) and next prime (421003423).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 421003395 and 421003404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421003421) 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, 547 + ... + 29022.

It is an arithmetic number, because the mean of its divisors is an integer number (21911370).

Almost surely, 2^421003422 is an apocalyptic number.

421003422 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 421003422, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (525872880).

421003422 is an abundant number, since it is smaller than the sum of its proper divisors (630742338).

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

421003422 is a wasteful number, since it uses less digits than its factorization.

421003422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29697 (or 29694 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 421003422 is about 20518.3679175513. The cubic root of 421003422 is about 749.4831532411.

Adding to 421003422 its reverse (224300124), we get a palindrome (645303546).

The spelling of 421003422 in words is "four hundred twenty-one million, three thousand, four hundred twenty-two".