8254721 has 4 divisors (see below), whose sum is σ = 8689200. Its totient is φ = 7820244.

The previous prime is 8254709. The next prime is 8254747. The reversal of 8254721 is 1274528.

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 a cyclic number.

It is not a de Polignac number, because 8254721 - 2¹⁰ = 8253697 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8254121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 217211 + ... + 217248.

It is an arithmetic number, because the mean of its divisors is an integer number (2172300).

Almost surely, 2^8254721 is an apocalyptic number.

It is an amenable number.

8254721 is a deficient number, since it is larger than the sum of its proper divisors (434479).

8254721 is a wasteful number, since it uses less digits than its factorization.

8254721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434478.

The product of its digits is 4480, while the sum is 29.

The square root of 8254721 is about 2873.1030263463. The cubic root of 8254721 is about 202.1005364979.

The spelling of 8254721 in words is "eight million, two hundred fifty-four thousand, seven hundred twenty-one".