3406561 has 4 divisors (see below), whose sum is σ = 3415300. Its totient is φ = 3397824.

The previous prime is 3406547. The next prime is 3406573. The reversal of 3406561 is 1656043.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1806336 + 1600225 = 1344^2 + 1265^2 .

It is a cyclic number.

It is not a de Polignac number, because 3406561 - 2⁷ = 3406433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3406531) 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, 3756 + ... + 4573.

It is an arithmetic number, because the mean of its divisors is an integer number (853825).

Almost surely, 2^3406561 is an apocalyptic number.

It is an amenable number.

3406561 is a deficient number, since it is larger than the sum of its proper divisors (8739).

3406561 is an equidigital number, since it uses as much as digits as its factorization.

3406561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8738.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 3406561 is about 1845.6871349175. The cubic root of 3406561 is about 150.4661204151.

The spelling of 3406561 in words is "three million, four hundred six thousand, five hundred sixty-one".