8421498 has 24 divisors (see below), whose sum is σ = 18521568. Its totient is φ = 2764872.

The previous prime is 8421493. The next prime is 8421509. The reversal of 8421498 is 8941248.

It is a d-powerful number, because it can be written as 8 + 4² + 2²³ + 1 + 4² + 9² + 8⁵ .

It is not an unprimeable number, because it can be changed into a prime (8421493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2286 + ... + 4697.

It is an arithmetic number, because the mean of its divisors is an integer number (771732).

Almost surely, 2^8421498 is an apocalyptic number.

8421498 is an abundant number, since it is smaller than the sum of its proper divisors (10100070).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8421498 is a wasteful number, since it uses less digits than its factorization.

8421498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7058 (or 7055 counting only the distinct ones).

The product of its digits is 18432, while the sum is 36.

The square root of 8421498 is about 2901.9817366758. The cubic root of 8421498 is about 203.4525402105.

The spelling of 8421498 in words is "eight million, four hundred twenty-one thousand, four hundred ninety-eight".