8421321248 has 12 divisors (see below), whose sum is σ = 16579476270. Its totient is φ = 4210660608.

The previous prime is 8421321247. The next prime is 8421321287. The reversal of 8421321248 is 8421231248.

It can be written as a sum of positive squares in only one way, i.e., 5054072464 + 3367248784 = 71092^2 + 58028^2 .

It is not an unprimeable number, because it can be changed into a prime (8421321247) 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 as a sum of consecutive naturals, namely, 131583113 + ... + 131583176.

Almost surely, 2^8421321248 is an apocalyptic number.

It is an amenable number.

8421321248 is a deficient number, since it is larger than the sum of its proper divisors (8158155022).

8421321248 is a wasteful number, since it uses less digits than its factorization.

8421321248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263166299 (or 263166291 counting only the distinct ones).

The product of its digits is 24576, while the sum is 35.

The square root of 8421321248 is about 91767.7571263459. The cubic root of 8421321248 is about 2034.5111683369.

Subtracting from 8421321248 its reverse (8421231248), we obtain a square (90000 = 300²).

The spelling of 8421321248 in words is "eight billion, four hundred twenty-one million, three hundred twenty-one thousand, two hundred forty-eight".