3853681 has 4 divisors (see below), whose sum is σ = 4150132. Its totient is φ = 3557232.

The previous prime is 3853669. The next prime is 3853687. The reversal of 3853681 is 1863583.

It is a happy number.

3853681 is nontrivially palindromic in base 9.

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 1245456 + 2608225 = 1116^2 + 1615^2 .

It is a cyclic number.

It is not a de Polignac number, because 3853681 - 2⁵ = 3853649 is a prime.

It is a super-2 number, since 2×3853681² = 29701714499522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3853687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 148206 + ... + 148231.

It is an arithmetic number, because the mean of its divisors is an integer number (1037533).

Almost surely, 2^3853681 is an apocalyptic number.

It is an amenable number.

3853681 is a deficient number, since it is larger than the sum of its proper divisors (296451).

3853681 is a wasteful number, since it uses less digits than its factorization.

3853681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296450.

The product of its digits is 17280, while the sum is 34.

The square root of 3853681 is about 1963.0794685901. The cubic root of 3853681 is about 156.7804550338.

The spelling of 3853681 in words is "three million, eight hundred fifty-three thousand, six hundred eighty-one".