3684281 has 4 divisors (see below), whose sum is σ = 3688932. Its totient is φ = 3679632.

The previous prime is 3684253. The next prime is 3684293. The reversal of 3684281 is 1824863.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1824863 = 127 ⋅14369.

It can be written as a sum of positive squares in 2 ways, for example, as 40000 + 3644281 = 200^2 + 1909^2 .

It is a cyclic number.

It is not a de Polignac number, because 3684281 - 2¹⁰ = 3683257 is a prime.

It is a super-2 number, since 2×3684281² = 27147852973922, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3684211) 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, 806 + ... + 2831.

It is an arithmetic number, because the mean of its divisors is an integer number (922233).

Almost surely, 2^3684281 is an apocalyptic number.

It is an amenable number.

3684281 is a deficient number, since it is larger than the sum of its proper divisors (4651).

3684281 is a wasteful number, since it uses less digits than its factorization.

3684281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4650.

The product of its digits is 9216, while the sum is 32.

The square root of 3684281 is about 1919.4480977614. The cubic root of 3684281 is about 154.4486970211.

The spelling of 3684281 in words is "three million, six hundred eighty-four thousand, two hundred eighty-one".