3920841 has 6 divisors (see below), whose sum is σ = 5663450. Its totient is φ = 2613888.

The previous prime is 3920797. The next prime is 3920843. The reversal of 3920841 is 1480293.

It can be written as a sum of positive squares in only one way, i.e., 3920400 + 441 = 1980^2 + 21^2 .

It is not a de Polignac number, because 3920841 - 2¹¹ = 3918793 is a prime.

It is a Duffinian number.

3920841 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3920843) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 217816 + ... + 217833.

Almost surely, 2^3920841 is an apocalyptic number.

It is an amenable number.

3920841 is a deficient number, since it is larger than the sum of its proper divisors (1742609).

3920841 is a wasteful number, since it uses less digits than its factorization.

3920841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435655 (or 435652 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 3920841 is about 1980.1113605048. Note that the first 3 decimals coincide. The cubic root of 3920841 is about 157.6859783423.

It can be divided in two parts, 3920 and 841, that added together give a square (4761 = 69²).

The spelling of 3920841 in words is "three million, nine hundred twenty thousand, eight hundred forty-one".