8481221 has 4 divisors (see below), whose sum is σ = 9692832. Its totient is φ = 7269612.

The previous prime is 8481211. The next prime is 8481223. The reversal of 8481221 is 1221848.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 8481221 - 2⁶ = 8481157 is a prime.

It is a super-2 number, since 2×8481221² = 143862219301682, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8481223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 605795 + ... + 605808.

It is an arithmetic number, because the mean of its divisors is an integer number (2423208).

Almost surely, 2^8481221 is an apocalyptic number.

It is an amenable number.

8481221 is a deficient number, since it is larger than the sum of its proper divisors (1211611).

8481221 is a wasteful number, since it uses less digits than its factorization.

8481221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1211610.

The product of its digits is 1024, while the sum is 26.

The square root of 8481221 is about 2912.2535947269. The cubic root of 8481221 is about 203.9323513359.

The spelling of 8481221 in words is "eight million, four hundred eighty-one thousand, two hundred twenty-one".