3685705 has 8 divisors (see below), whose sum is σ = 4435272. Its totient is φ = 2940288.

The previous prime is 3685699. The next prime is 3685729. The reversal of 3685705 is 5075863.

It is a happy number.

3685705 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1138489 + 2547216 = 1067^2 + 1596^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3685705 - 2¹⁵ = 3652937 is a prime.

It is a Duffinian number.

3685705 is a lucky number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1479 + ... + 3091.

It is an arithmetic number, because the mean of its divisors is an integer number (554409).

Almost surely, 2^3685705 is an apocalyptic number.

It is an amenable number.

3685705 is a deficient number, since it is larger than the sum of its proper divisors (749567).

3685705 is a wasteful number, since it uses less digits than its factorization.

3685705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2075.

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 3685705 is about 1919.8190018853. The cubic root of 3685705 is about 154.4685929533.

The spelling of 3685705 in words is "three million, six hundred eighty-five thousand, seven hundred five".