2421556 has 12 divisors (see below), whose sum is σ = 4296292. Its totient is φ = 1194048.

The previous prime is 2421553. The next prime is 2421577. The reversal of 2421556 is 6551242.

2421556 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 933156 + 1488400 = 966^2 + 1220^2 .

It is a super-2 number, since 2×2421556² = 11727866922272, 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 2421556.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2421553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3855 + ... + 4438.

2^2421556 is an apocalyptic number.

It is an amenable number.

2421556 is a deficient number, since it is larger than the sum of its proper divisors (1874736).

2421556 is a wasteful number, since it uses less digits than its factorization.

2421556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8370 (or 8368 counting only the distinct ones).

The product of its digits is 2400, while the sum is 25.

The square root of 2421556 is about 1556.1349555871. The cubic root of 2421556 is about 134.2862374681.

Adding to 2421556 its reverse (6551242), we get a palindrome (8972798).

The spelling of 2421556 in words is "two million, four hundred twenty-one thousand, five hundred fifty-six".