3684561 has 4 divisors (see below), whose sum is σ = 4912752. Its totient is φ = 2456372.

The previous prime is 3684559. The next prime is 3684587. The reversal of 3684561 is 1654863.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3684561 - 2¹ = 3684559 is a prime.

It is a D-number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3684061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 614091 + ... + 614096.

It is an arithmetic number, because the mean of its divisors is an integer number (1228188).

Almost surely, 2^3684561 is an apocalyptic number.

It is an amenable number.

3684561 is a deficient number, since it is larger than the sum of its proper divisors (1228191).

3684561 is a wasteful number, since it uses less digits than its factorization.

3684561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1228190.

The product of its digits is 17280, while the sum is 33.

The square root of 3684561 is about 1919.5210340082. The cubic root of 3684561 is about 154.4526095475.

The spelling of 3684561 in words is "three million, six hundred eighty-four thousand, five hundred sixty-one".