4102561 has 2 divisors, whose sum is σ = 4102562. Its totient is φ = 4102560.

The previous prime is 4102541. The next prime is 4102573. The reversal of 4102561 is 1652014.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4100625 + 1936 = 2025^2 + 44^2 .

It is a cyclic number.

It is not a de Polignac number, because 4102561 - 2⁵ = 4102529 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (4102541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2051280 + 2051281.

It is an arithmetic number, because the mean of its divisors is an integer number (2051281).

Almost surely, 2^4102561 is an apocalyptic number.

It is an amenable number.

4102561 is a deficient number, since it is larger than the sum of its proper divisors (1).

4102561 is an equidigital number, since it uses as much as digits as its factorization.

4102561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 4102561 is about 2025.4779682830. The cubic root of 4102561 is about 160.0853841141.

Adding to 4102561 its reverse (1652014), we get a palindrome (5754575).

The spelling of 4102561 in words is "four million, one hundred two thousand, five hundred sixty-one".