3285661 has 4 divisors (see below), whose sum is σ = 3289500. Its totient is φ = 3281824.

The previous prime is 3285647. The next prime is 3285677. The reversal of 3285661 is 1665823.

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.

It can be written as a sum of positive squares in 2 ways, for example, as 2869636 + 416025 = 1694^2 + 645^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3285661 is a prime.

It is a Duffinian number.

3285661 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3280661) 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, 15 + ... + 2563.

It is an arithmetic number, because the mean of its divisors is an integer number (822375).

Almost surely, 2^3285661 is an apocalyptic number.

It is an amenable number.

3285661 is a deficient number, since it is larger than the sum of its proper divisors (3839).

3285661 is a wasteful number, since it uses less digits than its factorization.

3285661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3838.

The product of its digits is 8640, while the sum is 31.

The square root of 3285661 is about 1812.6392360313. The cubic root of 3285661 is about 148.6646060251.

The spelling of 3285661 in words is "three million, two hundred eighty-five thousand, six hundred sixty-one".