3825861 has 16 divisors (see below), whose sum is σ = 5529216. Its totient is φ = 2339136.

The previous prime is 3825853. The next prime is 3825869. The reversal of 3825861 is 1685283.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (3825853) and next prime (3825869).

It is not a de Polignac number, because 3825861 - 2³ = 3825853 is a prime.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3825869) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10071 + ... + 10443.

It is an arithmetic number, because the mean of its divisors is an integer number (345576).

Almost surely, 2^3825861 is an apocalyptic number.

It is an amenable number.

3825861 is a deficient number, since it is larger than the sum of its proper divisors (1703355).

3825861 is a wasteful number, since it uses less digits than its factorization.

3825861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 652.

The product of its digits is 11520, while the sum is 33.

The square root of 3825861 is about 1955.9808281269. The cubic root of 3825861 is about 156.4022737398.

The spelling of 3825861 in words is "three million, eight hundred twenty-five thousand, eight hundred sixty-one".