6422561 has 2 divisors, whose sum is σ = 6422562. Its totient is φ = 6422560.

The previous prime is 6422557. The next prime is 6422567. The reversal of 6422561 is 1652246.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6031936 + 390625 = 2456^2 + 625^2 .

It is a cyclic number.

It is not a de Polignac number, because 6422561 - 2² = 6422557 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 6422561.

It is not a weakly prime, because it can be changed into another prime (6422567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3211280 + 3211281.

It is an arithmetic number, because the mean of its divisors is an integer number (3211281).

Almost surely, 2^6422561 is an apocalyptic number.

It is an amenable number.

6422561 is a deficient number, since it is larger than the sum of its proper divisors (1).

6422561 is an equidigital number, since it uses as much as digits as its factorization.

6422561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2880, while the sum is 26.

The square root of 6422561 is about 2534.2772145130. The cubic root of 6422561 is about 185.8814618361.

The spelling of 6422561 in words is "six million, four hundred twenty-two thousand, five hundred sixty-one".