2421520 has 20 divisors (see below), whose sum is σ = 5630220. Its totient is φ = 968576.

The previous prime is 2421511. The next prime is 2421527. The reversal of 2421520 is 251242.

It can be written as a sum of positive squares in 2 ways, for example, as 1468944 + 952576 = 1212^2 + 976^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×2421520² = 11727518220800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 2421494 and 2421503.

It is not an unprimeable number, because it can be changed into a prime (2421527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15055 + ... + 15214.

It is an arithmetic number, because the mean of its divisors is an integer number (281511).

2^2421520 is an apocalyptic number.

2421520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2421520 is an abundant number, since it is smaller than the sum of its proper divisors (3208700).

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

2421520 is a wasteful number, since it uses less digits than its factorization.

2421520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30282 (or 30276 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 2421520 is about 1556.1233884239. The cubic root of 2421520 is about 134.2855720105.

Adding to 2421520 its reverse (251242), we get a palindrome (2672762).

The spelling of 2421520 in words is "two million, four hundred twenty-one thousand, five hundred twenty".