4445561 has 2 divisors, whose sum is σ = 4445562. Its totient is φ = 4445560.

The previous prime is 4445557. The next prime is 4445569. The reversal of 4445561 is 1655444.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2325625 + 2119936 = 1525^2 + 1456^2 .

It is a cyclic number.

It is not a de Polignac number, because 4445561 - 2² = 4445557 is a prime.

It is a super-4 number, since 4×4445561⁴ (a number of 28 digits) contains 4444 as substring.

It is not a weakly prime, because it can be changed into another prime (4445569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2222780 + 2222781.

It is an arithmetic number, because the mean of its divisors is an integer number (2222781).

Almost surely, 2^4445561 is an apocalyptic number.

It is an amenable number.

4445561 is a deficient number, since it is larger than the sum of its proper divisors (1).

4445561 is an equidigital number, since it uses as much as digits as its factorization.

4445561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9600, while the sum is 29.

The square root of 4445561 is about 2108.4499045507. The cubic root of 4445561 is about 164.4279054498.

The spelling of 4445561 in words is "four million, four hundred forty-five thousand, five hundred sixty-one".