6220561 has 8 divisors (see below), whose sum is σ = 6416424. Its totient is φ = 6026880.

The previous prime is 6220519. The next prime is 6220567. The reversal of 6220561 is 1650226.

It can be written as a sum of positive squares in 4 ways, for example, as 1640961 + 4579600 = 1281^2 + 2140^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6220561 - 2⁷ = 6220433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6220567) 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 in 7 ways as a sum of consecutive naturals, for example, 6655 + ... + 7531.

It is an arithmetic number, because the mean of its divisors is an integer number (802053).

Almost surely, 2^6220561 is an apocalyptic number.

It is an amenable number.

6220561 is a deficient number, since it is larger than the sum of its proper divisors (195863).

6220561 is a wasteful number, since it uses less digits than its factorization.

6220561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1091.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 6220561 is about 2494.1052503854. The cubic root of 6220561 is about 183.9119084465.

Adding to 6220561 its reverse (1650226), we get a palindrome (7870787).

The spelling of 6220561 in words is "six million, two hundred twenty thousand, five hundred sixty-one".