4921856 has 20 divisors (see below), whose sum is σ = 9835122. Its totient is φ = 2460672.

The previous prime is 4921853. The next prime is 4921871. The reversal of 4921856 is 6581294.

It can be written as a sum of positive squares in only one way, i.e., 2611456 + 2310400 = 1616^2 + 1520^2 .

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

It is a zygodrome in base 5.

It is not an unprimeable number, because it can be changed into a prime (4921853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4295 + ... + 5318.

Almost surely, 2^4921856 is an apocalyptic number.

It is an amenable number.

4921856 is a deficient number, since it is larger than the sum of its proper divisors (4913266).

4921856 is an frugal number, since it uses more digits than its factorization.

4921856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9631 (or 9615 counting only the distinct ones).

The product of its digits is 17280, while the sum is 35.

The square root of 4921856 is about 2218.5256365433. The cubic root of 4921856 is about 170.1020840156.

The spelling of 4921856 in words is "four million, nine hundred twenty-one thousand, eight hundred fifty-six".