3565561 has 8 divisors (see below), whose sum is σ = 3680640. Its totient is φ = 3452208.

The previous prime is 3565553. The next prime is 3565567. The reversal of 3565561 is 1655653.

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 3565561 - 2³ = 3565553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3565567) 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, 4675 + ... + 5383.

It is an arithmetic number, because the mean of its divisors is an integer number (460080).

Almost surely, 2^3565561 is an apocalyptic number.

It is an amenable number.

3565561 is a deficient number, since it is larger than the sum of its proper divisors (115079).

3565561 is a wasteful number, since it uses less digits than its factorization.

3565561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 863.

The product of its digits is 13500, while the sum is 31.

The square root of 3565561 is about 1888.2693134190. The cubic root of 3565561 is about 152.7715987755.

The spelling of 3565561 in words is "three million, five hundred sixty-five thousand, five hundred sixty-one".