3564661 has 2 divisors, whose sum is σ = 3564662. Its totient is φ = 3564660.

The previous prime is 3564643. The next prime is 3564677. The reversal of 3564661 is 1664653.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3478225 + 86436 = 1865^2 + 294^2 .

It is an emirp because it is prime and its reverse (1664653) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3564661 - 2⁵ = 3564629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3564061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1782330 + 1782331.

It is an arithmetic number, because the mean of its divisors is an integer number (1782331).

Almost surely, 2^3564661 is an apocalyptic number.

It is an amenable number.

3564661 is a deficient number, since it is larger than the sum of its proper divisors (1).

3564661 is an equidigital number, since it uses as much as digits as its factorization.

3564661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 31.

The square root of 3564661 is about 1888.0309849152. The cubic root of 3564661 is about 152.7587437616.

It can be divided in two parts, 3564 and 661, that added together give a square (4225 = 65²).

The spelling of 3564661 in words is "three million, five hundred sixty-four thousand, six hundred sixty-one".