3561601 has 4 divisors (see below), whose sum is σ = 3566592. Its totient is φ = 3556612.

The previous prime is 3561581. The next prime is 3561611. The reversal of 3561601 is 1061653.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1061653 = 83 ⋅12791.

It is a cyclic number.

It is not a de Polignac number, because 3561601 - 2¹³ = 3553409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3561611) 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, 1201 + ... + 2926.

It is an arithmetic number, because the mean of its divisors is an integer number (891648).

Almost surely, 2^3561601 is an apocalyptic number.

It is an amenable number.

3561601 is a deficient number, since it is larger than the sum of its proper divisors (4991).

3561601 is an equidigital number, since it uses as much as digits as its factorization.

3561601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4990.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 3561601 is about 1887.2204428736. The cubic root of 3561601 is about 152.7150205226.

The spelling of 3561601 in words is "three million, five hundred sixty-one thousand, six hundred one".