3561685 has 8 divisors (see below), whose sum is σ = 4284216. Its totient is φ = 2842560.

The previous prime is 3561673. The next prime is 3561689. The reversal of 3561685 is 5861653.

It can be written as a sum of positive squares in 4 ways, for example, as 651249 + 2910436 = 807^2 + 1706^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-3561685 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3561685.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3561689) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3315 + ... + 4255.

It is an arithmetic number, because the mean of its divisors is an integer number (535527).

Almost surely, 2^3561685 is an apocalyptic number.

It is an amenable number.

3561685 is a deficient number, since it is larger than the sum of its proper divisors (722531).

3561685 is an equidigital number, since it uses as much as digits as its factorization.

3561685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1703.

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

The square root of 3561685 is about 1887.2426976942. The cubic root of 3561685 is about 152.7162211026.

Subtracting 3561685 from its reverse (5861653), we obtain a cube (2299968 = 132³).

The spelling of 3561685 in words is "three million, five hundred sixty-one thousand, six hundred eighty-five".