6410561 has 2 divisors, whose sum is σ = 6410562. Its totient is φ = 6410560.

The previous prime is 6410557. The next prime is 6410563. The reversal of 6410561 is 1650146.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3400336 + 3010225 = 1844^2 + 1735^2 .

It is a cyclic number.

It is not a de Polignac number, because 6410561 - 2² = 6410557 is a prime.

Together with 6410563, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (6410563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3205280 + 3205281.

It is an arithmetic number, because the mean of its divisors is an integer number (3205281).

Almost surely, 2^6410561 is an apocalyptic number.

It is an amenable number.

6410561 is a deficient number, since it is larger than the sum of its proper divisors (1).

6410561 is an equidigital number, since it uses as much as digits as its factorization.

6410561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 6410561 is about 2531.9085686493. The cubic root of 6410561 is about 185.7656218464.

The spelling of 6410561 in words is "six million, four hundred ten thousand, five hundred sixty-one".