8490281 has 2 divisors, whose sum is σ = 8490282. Its totient is φ = 8490280.

The previous prime is 8490271. The next prime is 8490323. The reversal of 8490281 is 1820948.

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., 5569600 + 2920681 = 2360^2 + 1709^2 .

It is a cyclic number.

It is not a de Polignac number, because 8490281 - 2⁶ = 8490217 is a prime.

It is a super-2 number, since 2×8490281² = 144169742917922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8490271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4245140 + 4245141.

It is an arithmetic number, because the mean of its divisors is an integer number (4245141).

Almost surely, 2^8490281 is an apocalyptic number.

It is an amenable number.

8490281 is a deficient number, since it is larger than the sum of its proper divisors (1).

8490281 is an equidigital number, since it uses as much as digits as its factorization.

8490281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 8490281 is about 2913.8086759429. The cubic root of 8490281 is about 204.0049418898.

The spelling of 8490281 in words is "eight million, four hundred ninety thousand, two hundred eighty-one".