8221258 has 16 divisors (see below), whose sum is σ = 12931776. Its totient is φ = 3912480.

The previous prime is 8221253. The next prime is 8221261. The reversal of 8221258 is 8521228.

It is not an unprimeable number, because it can be changed into a prime (8221253) 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, 14113 + ... + 14683.

It is an arithmetic number, because the mean of its divisors is an integer number (808236).

Almost surely, 2^8221258 is an apocalyptic number.

8221258 is a deficient number, since it is larger than the sum of its proper divisors (4710518).

8221258 is a wasteful number, since it uses less digits than its factorization.

8221258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 909.

The product of its digits is 2560, while the sum is 28.

The square root of 8221258 is about 2867.2736179165. The cubic root of 8221258 is about 201.8270748283.

It can be divided in two parts, 822 and 1258, that added together give a triangular number (2080 = T₆₄).

The spelling of 8221258 in words is "eight million, two hundred twenty-one thousand, two hundred fifty-eight".