3706561 has 8 divisors (see below), whose sum is σ = 4008960. Its totient is φ = 3413568.

The previous prime is 3706529. The next prime is 3706609. The reversal of 3706561 is 1656073.

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 3706561 - 2⁵ = 3706529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3706861) 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, 1521 + ... + 3118.

It is an arithmetic number, because the mean of its divisors is an integer number (501120).

Almost surely, 2^3706561 is an apocalyptic number.

It is an amenable number.

3706561 is a deficient number, since it is larger than the sum of its proper divisors (302399).

3706561 is a wasteful number, since it uses less digits than its factorization.

3706561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4703.

The product of its (nonzero) digits is 3780, while the sum is 28.

The square root of 3706561 is about 1925.2431015329. The cubic root of 3706561 is about 154.7594047437.

The spelling of 3706561 in words is "three million, seven hundred six thousand, five hundred sixty-one".