4821865 has 4 divisors (see below), whose sum is σ = 5786244. Its totient is φ = 3857488.

The previous prime is 4821853. The next prime is 4821889. The reversal of 4821865 is 5681284.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3829849 + 992016 = 1957^2 + 996^2 .

It is a cyclic number.

It is not a de Polignac number, because 4821865 - 2⁷ = 4821737 is a prime.

It is an Ulam number.

It is a Duffinian number.

4821865 is a lucky number.

It is a nialpdrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 4821865.

It is an unprimeable number.

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, 482182 + ... + 482191.

It is an arithmetic number, because the mean of its divisors is an integer number (1446561).

Almost surely, 2^4821865 is an apocalyptic number.

It is an amenable number.

4821865 is a deficient number, since it is larger than the sum of its proper divisors (964379).

4821865 is an equidigital number, since it uses as much as digits as its factorization.

4821865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 964378.

The product of its digits is 15360, while the sum is 34.

The square root of 4821865 is about 2195.8745410428. The cubic root of 4821865 is about 168.9422792272.

The spelling of 4821865 in words is "four million, eight hundred twenty-one thousand, eight hundred sixty-five".