8053721 has 8 divisors (see below), whose sum is σ = 8837640. Its totient is φ = 7293312.

The previous prime is 8053693. The next prime is 8053751. The reversal of 8053721 is 1273508.

It can be written as a sum of positive squares in 4 ways, for example, as 3013696 + 5040025 = 1736^2 + 2245^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-8053721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8053751) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5156 + ... + 6533.

It is an arithmetic number, because the mean of its divisors is an integer number (1104705).

Almost surely, 2^8053721 is an apocalyptic number.

It is an amenable number.

8053721 is a deficient number, since it is larger than the sum of its proper divisors (783919).

8053721 is a wasteful number, since it uses less digits than its factorization.

8053721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11755.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 8053721 is about 2837.9078561504. The cubic root of 8053721 is about 200.4466766571.

The spelling of 8053721 in words is "eight million, fifty-three thousand, seven hundred twenty-one".