4720561 has 2 divisors, whose sum is σ = 4720562. Its totient is φ = 4720560.

The previous prime is 4720559. The next prime is 4720601. The reversal of 4720561 is 1650274.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4490161 + 230400 = 2119^2 + 480^2 .

It is a cyclic number.

It is not a de Polignac number, because 4720561 - 2¹ = 4720559 is a prime.

Together with 4720559, it forms a pair of twin primes.

4720561 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4720501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2360280 + 2360281.

It is an arithmetic number, because the mean of its divisors is an integer number (2360281).

Almost surely, 2^4720561 is an apocalyptic number.

It is an amenable number.

4720561 is a deficient number, since it is larger than the sum of its proper divisors (1).

4720561 is an equidigital number, since it uses as much as digits as its factorization.

4720561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 4720561 is about 2172.6852049940. The cubic root of 4720561 is about 167.7507760623.

The spelling of 4720561 in words is "four million, seven hundred twenty thousand, five hundred sixty-one".