5791721 has 8 divisors (see below), whose sum is σ = 6406344. Its totient is φ = 5201280.

The previous prime is 5791717. The next prime is 5791741. The reversal of 5791721 is 1271975.

It can be written as a sum of positive squares in 4 ways, for example, as 1297321 + 4494400 = 1139^2 + 2120^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 5791721 - 2² = 5791717 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (5791741) 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, 5540 + ... + 6501.

It is an arithmetic number, because the mean of its divisors is an integer number (800793).

Almost surely, 2^5791721 is an apocalyptic number.

It is an amenable number.

5791721 is a deficient number, since it is larger than the sum of its proper divisors (614623).

5791721 is a wasteful number, since it uses less digits than its factorization.

5791721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12091.

The product of its digits is 4410, while the sum is 32.

The square root of 5791721 is about 2406.5994681293. The cubic root of 5791721 is about 179.5846493098.

The spelling of 5791721 in words is "five million, seven hundred ninety-one thousand, seven hundred twenty-one".