2421040 has 40 divisors (see below), whose sum is σ = 5745168. Its totient is φ = 948480.

The previous prime is 2421031. The next prime is 2421043. The reversal of 2421040 is 401242.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×2421040² = 11722869363200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2421040.

It is not an unprimeable number, because it can be changed into a prime (2421043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3955 + ... + 4525.

2^2421040 is an apocalyptic number.

2421040 is a gapful number since it is divisible by the number (20) 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 2421040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2872584).

2421040 is an abundant number, since it is smaller than the sum of its proper divisors (3324128).

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

2421040 is a wasteful number, since it uses less digits than its factorization.

2421040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637 (or 631 counting only the distinct ones).

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

The square root of 2421040 is about 1555.9691513652. The cubic root of 2421040 is about 134.2766986122.

Adding to 2421040 its reverse (401242), we get a palindrome (2822282).

The spelling of 2421040 in words is "two million, four hundred twenty-one thousand, forty".