3409561 has 4 divisors (see below), whose sum is σ = 3452800. Its totient is φ = 3366324.

The previous prime is 3409529. The next prime is 3409573. The reversal of 3409561 is 1659043.

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: 1659043 = 37 ⋅44839.

It is a cyclic number.

It is not a de Polignac number, because 3409561 - 2⁵ = 3409529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3409591) 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, 21501 + ... + 21658.

It is an arithmetic number, because the mean of its divisors is an integer number (863200).

Almost surely, 2^3409561 is an apocalyptic number.

It is an amenable number.

3409561 is a deficient number, since it is larger than the sum of its proper divisors (43239).

3409561 is an equidigital number, since it uses as much as digits as its factorization.

3409561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43238.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 3409561 is about 1846.4996615218. The cubic root of 3409561 is about 150.5102769626.

The spelling of 3409561 in words is "three million, four hundred nine thousand, five hundred sixty-one".