8462221 has 2 divisors, whose sum is σ = 8462222. Its totient is φ = 8462220.

The previous prime is 8462213. The next prime is 8462249. The reversal of 8462221 is 1222648.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8328996 + 133225 = 2886^2 + 365^2 .

It is a cyclic number.

It is not a de Polignac number, because 8462221 - 2³ = 8462213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8462291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4231110 + 4231111.

It is an arithmetic number, because the mean of its divisors is an integer number (4231111).

Almost surely, 2^8462221 is an apocalyptic number.

It is an amenable number.

8462221 is a deficient number, since it is larger than the sum of its proper divisors (1).

8462221 is an equidigital number, since it uses as much as digits as its factorization.

8462221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1536, while the sum is 25.

The square root of 8462221 is about 2908.9896871594. The cubic root of 8462221 is about 203.7799514352.

Adding to 8462221 its reverse (1222648), we get a palindrome (9684869).

The spelling of 8462221 in words is "eight million, four hundred sixty-two thousand, two hundred twenty-one".