2021424 has 40 divisors (see below), whose sum is σ = 5452032. Its totient is φ = 644160.

The previous prime is 2021381. The next prime is 2021431. The reversal of 2021424 is 4241202.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 189 + ... + 2019.

2^2021424 is an apocalyptic number.

2021424 is a gapful number since it is divisible by the number (24) 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 2021424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2726016).

2021424 is an abundant number, since it is smaller than the sum of its proper divisors (3430608).

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

2021424 is a wasteful number, since it uses less digits than its factorization.

2021424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1865 (or 1859 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 2021424 is about 1421.7679135499. The cubic root of 2021424 is about 126.4403839343.

Adding to 2021424 its reverse (4241202), we get a palindrome (6262626).

The spelling of 2021424 in words is "two million, twenty-one thousand, four hundred twenty-four".