2521856 has 18 divisors (see below), whose sum is σ = 5034372. Its totient is φ = 1260800.

The previous prime is 2521847. The next prime is 2521901. The reversal of 2521856 is 6581252.

It is an alternating number because its digits alternate between even and odd.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4670 + ... + 5181.

2^2521856 is an apocalyptic number.

It is an amenable number.

2521856 is a deficient number, since it is larger than the sum of its proper divisors (2512516).

2521856 is an frugal number, since it uses more digits than its factorization.

2521856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9867 (or 9853 counting only the distinct ones).

The product of its digits is 4800, while the sum is 29.

The square root of 2521856 is about 1588.0352640921. The cubic root of 2521856 is about 136.1152425729.

The spelling of 2521856 in words is "two million, five hundred twenty-one thousand, eight hundred fifty-six".