3820825 has 6 divisors (see below), whose sum is σ = 4737854. Its totient is φ = 3056640.

The previous prime is 3820813. The next prime is 3820841. The reversal of 3820825 is 5280283.

3820825 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 3 ways, for example, as 149769 + 3671056 = 387^2 + 1916^2 .

It is not a de Polignac number, because 3820825 - 2¹⁷ = 3689753 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3820793 and 3820802.

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 5 ways as a sum of consecutive naturals, for example, 76392 + ... + 76441.

Almost surely, 2^3820825 is an apocalyptic number.

It is an amenable number.

3820825 is a deficient number, since it is larger than the sum of its proper divisors (917029).

3820825 is a wasteful number, since it uses less digits than its factorization.

3820825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152843 (or 152838 counting only the distinct ones).

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

The square root of 3820825 is about 1954.6930705356. The cubic root of 3820825 is about 156.3336192421. Note that the first 3 decimals are identical.

The spelling of 3820825 in words is "three million, eight hundred twenty thousand, eight hundred twenty-five".