8447121 has 6 divisors (see below), whose sum is σ = 12201410. Its totient is φ = 5631408.

The previous prime is 8447119. The next prime is 8447129. The reversal of 8447121 is 1217448.

It can be written as a sum of positive squares in only one way, i.e., 7700625 + 746496 = 2775^2 + 864^2 .

It is not a de Polignac number, because 8447121 - 2¹ = 8447119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8447129) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 469276 + ... + 469293.

Almost surely, 2^8447121 is an apocalyptic number.

It is an amenable number.

8447121 is a deficient number, since it is larger than the sum of its proper divisors (3754289).

8447121 is a wasteful number, since it uses less digits than its factorization.

8447121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 938575 (or 938572 counting only the distinct ones).

The product of its digits is 1792, while the sum is 27.

The square root of 8447121 is about 2906.3931255080. The cubic root of 8447121 is about 203.6586708505.

The spelling of 8447121 in words is "eight million, four hundred forty-seven thousand, one hundred twenty-one".