6221305 has 4 divisors (see below), whose sum is σ = 7465572. Its totient is φ = 4977040.

The previous prime is 6221287. The next prime is 6221309. The reversal of 6221305 is 5031226.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5031226 = 2 ⋅2515613.

It can be written as a sum of positive squares in 2 ways, for example, as 4272489 + 1948816 = 2067^2 + 1396^2 .

It is not a de Polignac number, because 6221305 - 2⁵ = 6221273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6221309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 622126 + ... + 622135.

It is an arithmetic number, because the mean of its divisors is an integer number (1866393).

Almost surely, 2^6221305 is an apocalyptic number.

It is an amenable number.

6221305 is a deficient number, since it is larger than the sum of its proper divisors (1244267).

6221305 is a wasteful number, since it uses less digits than its factorization.

6221305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1244266.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 6221305 is about 2494.2543976106. The cubic root of 6221305 is about 183.9192403150.

The spelling of 6221305 in words is "six million, two hundred twenty-one thousand, three hundred five".