8998521 has 16 divisors (see below), whose sum is σ = 13820928. Its totient is φ = 5101200.

The previous prime is 8998519. The next prime is 8998547. The reversal of 8998521 is 1258998.

It is a happy number.

8998521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8998521 - 2¹ = 8998519 is a prime.

8998521 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (8998421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1116 + ... + 4386.

It is an arithmetic number, because the mean of its divisors is an integer number (863808).

Almost surely, 2^8998521 is an apocalyptic number.

It is an amenable number.

8998521 is a deficient number, since it is larger than the sum of its proper divisors (4822407).

8998521 is a wasteful number, since it uses less digits than its factorization.

8998521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3412.

The product of its digits is 51840, while the sum is 42.

The square root of 8998521 is about 2999.7534898721. The cubic root of 8998521 is about 207.9969874440.

The spelling of 8998521 in words is "eight million, nine hundred ninety-eight thousand, five hundred twenty-one".