3020561 has 4 divisors (see below), whose sum is σ = 3065712. Its totient is φ = 2975412.

The previous prime is 3020557. The next prime is 3020579. The reversal of 3020561 is 1650203.

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: 1650203 = 743 ⋅2221.

It is a cyclic number.

It is not a de Polignac number, because 3020561 - 2² = 3020557 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3020551) 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, 22475 + ... + 22608.

It is an arithmetic number, because the mean of its divisors is an integer number (766428).

Almost surely, 2^3020561 is an apocalyptic number.

It is an amenable number.

3020561 is a deficient number, since it is larger than the sum of its proper divisors (45151).

3020561 is an equidigital number, since it uses as much as digits as its factorization.

3020561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45150.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 3020561 is about 1737.9761218153. The cubic root of 3020561 is about 144.5536970726.

Adding to 3020561 its reverse (1650203), we get a palindrome (4670764).

The spelling of 3020561 in words is "three million, twenty thousand, five hundred sixty-one".