3696561 has 12 divisors (see below), whose sum is σ = 5825040. Its totient is φ = 2240280.

The previous prime is 3696557. The next prime is 3696577. The reversal of 3696561 is 1656963.

3696561 is a `hidden beast` number, since 3 + 6 + 96 + 561 = 666.

It is not a de Polignac number, because 3696561 - 2² = 3696557 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3696551) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18571 + ... + 18768.

It is an arithmetic number, because the mean of its divisors is an integer number (485420).

Almost surely, 2^3696561 is an apocalyptic number.

It is an amenable number.

3696561 is a deficient number, since it is larger than the sum of its proper divisors (2128479).

3696561 is a wasteful number, since it uses less digits than its factorization.

3696561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37356 (or 37353 counting only the distinct ones).

The product of its digits is 29160, while the sum is 36.

The square root of 3696561 is about 1922.6442728700. The cubic root of 3696561 is about 154.6201032997.

The spelling of 3696561 in words is "three million, six hundred ninety-six thousand, five hundred sixty-one".