421024 has 24 divisors (see below), whose sum is σ = 846720. Its totient is φ = 206016.

The previous prime is 421019. The next prime is 421033. The reversal of 421024 is 420124.

It is a super-2 number, since 2×421024² = 354522417152, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 420995 and 421013.

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, 1777 + ... + 1999.

It is an arithmetic number, because the mean of its divisors is an integer number (35280).

2⁴²¹⁰²⁴ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (423360).

421024 is an abundant number, since it is smaller than the sum of its proper divisors (425696).

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

421024 is a wasteful number, since it uses less digits than its factorization.

421024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292 (or 284 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 421024 is about 648.8636220347. The cubic root of 421024 is about 74.9495364237.

Adding to 421024 its reverse (420124), we get a palindrome (841148).

Subtracting from 421024 its reverse (420124), we obtain a square (900 = 30²).

The spelling of 421024 in words is "four hundred twenty-one thousand, twenty-four", and thus it is an iban number.