3685651 has 4 divisors (see below), whose sum is σ = 3902472. Its totient is φ = 3468832.

The previous prime is 3685631. The next prime is 3685657. The reversal of 3685651 is 1565863.

3685651 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3685651 - 2¹³ = 3677459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3685657) 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 3 ways as a sum of consecutive naturals, for example, 108385 + ... + 108418.

It is an arithmetic number, because the mean of its divisors is an integer number (975618).

Almost surely, 2^3685651 is an apocalyptic number.

3685651 is a deficient number, since it is larger than the sum of its proper divisors (216821).

3685651 is a wasteful number, since it uses less digits than its factorization.

3685651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216820.

The product of its digits is 21600, while the sum is 34.

The square root of 3685651 is about 1919.8049380080. The cubic root of 3685651 is about 154.4678385663.

The spelling of 3685651 in words is "three million, six hundred eighty-five thousand, six hundred fifty-one".