2421856 has 12 divisors (see below), whose sum is σ = 4768092. Its totient is φ = 1210912.

The previous prime is 2421847. The next prime is 2421893. The reversal of 2421856 is 6581242.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37810 + ... + 37873.

It is an arithmetic number, because the mean of its divisors is an integer number (397341).

2^2421856 is an apocalyptic number.

It is an amenable number.

2421856 is a deficient number, since it is larger than the sum of its proper divisors (2346236).

2421856 is an equidigital number, since it uses as much as digits as its factorization.

2421856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75693 (or 75685 counting only the distinct ones).

The product of its digits is 3840, while the sum is 28.

The square root of 2421856 is about 1556.2313452697. The cubic root of 2421856 is about 134.2917826916.

The spelling of 2421856 in words is "two million, four hundred twenty-one thousand, eight hundred fifty-six".