3120561 has 12 divisors (see below), whose sum is σ = 4550260. Its totient is φ = 2060640.

The previous prime is 3120547. The next prime is 3120563. The reversal of 3120561 is 1650213.

It can be written as a sum of positive squares in 2 ways, for example, as 1089936 + 2030625 = 1044^2 + 1425^2 .

It is not a de Polignac number, because 3120561 - 2⁵ = 3120529 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3120563) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 610 + ... + 2571.

Almost surely, 2^3120561 is an apocalyptic number.

It is an amenable number.

3120561 is a deficient number, since it is larger than the sum of its proper divisors (1429699).

3120561 is a wasteful number, since it uses less digits than its factorization.

3120561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3296 (or 3293 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 3120561 is about 1766.5109679818. The cubic root of 3120561 is about 146.1316289618.

Adding to 3120561 its reverse (1650213), we get a palindrome (4770774).

The spelling of 3120561 in words is "three million, one hundred twenty thousand, five hundred sixty-one".