3825991 has 6 divisors (see below), whose sum is σ = 4143120. Its totient is φ = 3531528.

The previous prime is 3825979. The next prime is 3826001. The reversal of 3825991 is 1995283.

3825991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-3825991 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3825991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3825931) by changing a digit.

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, 11151 + ... + 11488.

It is an arithmetic number, because the mean of its divisors is an integer number (690520).

Almost surely, 2^3825991 is an apocalyptic number.

3825991 is a deficient number, since it is larger than the sum of its proper divisors (317129).

3825991 is a wasteful number, since it uses less digits than its factorization.

3825991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22665 (or 22652 counting only the distinct ones).

The product of its digits is 19440, while the sum is 37.

The square root of 3825991 is about 1956.0140592542. The cubic root of 3825991 is about 156.4040451986.

The spelling of 3825991 in words is "three million, eight hundred twenty-five thousand, nine hundred ninety-one".