8474721 has 16 divisors (see below), whose sum is σ = 12083904. Its totient is φ = 5264384.

The previous prime is 8474717. The next prime is 8474723. The reversal of 8474721 is 1274748.

8474721 = T₉₉₀ + T₉₉₁ + ... + T₁₀₀₆.

8474721 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 8474721 - 2² = 8474717 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (8474723) 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 15 ways as a sum of consecutive naturals, for example, 4681 + ... + 6233.

It is an arithmetic number, because the mean of its divisors is an integer number (755244).

Almost surely, 2^8474721 is an apocalyptic number.

It is an amenable number.

8474721 is a deficient number, since it is larger than the sum of its proper divisors (3609183).

8474721 is a wasteful number, since it uses less digits than its factorization.

8474721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1680.

The product of its digits is 12544, while the sum is 33.

The square root of 8474721 is about 2911.1374065818. The cubic root of 8474721 is about 203.8802401653.

The spelling of 8474721 in words is "eight million, four hundred seventy-four thousand, seven hundred twenty-one".