4780561 has 2 divisors, whose sum is σ = 4780562. Its totient is φ = 4780560.

The previous prime is 4780549. The next prime is 4780597. The reversal of 4780561 is 1650874.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3841600 + 938961 = 1960^2 + 969^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4780561 is a prime.

It is not a weakly prime, because it can be changed into another prime (4780261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2390280 + 2390281.

It is an arithmetic number, because the mean of its divisors is an integer number (2390281).

Almost surely, 2^4780561 is an apocalyptic number.

It is an amenable number.

4780561 is a deficient number, since it is larger than the sum of its proper divisors (1).

4780561 is an equidigital number, since it uses as much as digits as its factorization.

4780561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 4780561 is about 2186.4494048571. The cubic root of 4780561 is about 168.4585098620.

It can be divided in two parts, 47 and 80561, that added together give a palindrome (80608).

The spelling of 4780561 in words is "four million, seven hundred eighty thousand, five hundred sixty-one".